MAHA SET 2015 Question Paper 2 Mathematical Sciences

Test Booklet No.
F
MATHEMATICAL SCIENCE
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2

MATHEMATICAL SCIENCE
Paper II
Time Allowed : 75 Minutes] [Maximum Marks : 100
Note : This Paper contains Fifty (50) multiple choice questions, each question
carrying Two (2) marks. Attempt All questions.

1. Let f : R R and g : [a, b] R 2. Let {an} be a sequence of positive

be defined as f(x) = x2 x R and numbers. Which of the following is

g(x) = x2 x [a, b]. Then : true ?

(A) f and g both are uniformly an
(A) Convergence of implies
n

continuous the convergence of an

(B) f is uniformly continuous and g an
(B) Convergence of implies
n

is continuous
the convergence of an

(C) f is continuous and g is
(C) Convergence of an implies the

uniformly continuous an
convergence of
n

(D) f and g both are continuous but
(D) Convergence of an implies the

not uniformly continuous an
convergence of
n

3 [P.T.O.

3. If S1 = 2 and Sn+1 = 2 Sn , 5. Let the linear transformation

n = 1, 2, 3...... , then {Sn} converges T : R3 R 4 be such that

to : T(1, 0, 0) = (1, 2, 0, 4), T(0, 1, 0) =

(2, 0, –1, –3), T(0, 0, 1) = (0, 0, 0, 0).
(A) 2
Then :

(B) 2 2 (A) T(x, y, z) = (x + 2y, – x, y, 4x + 3y)

(B) T(x, y, z) = (x + 2y, 2x, –y, 4x – 3y)
(C) 2 2
(C) T(x, y, z) = (x – 2y, – x, y, 4x + 3y)

(D) 2
(D) T(x, y, z) = (x – 2y, x, –y, –4x – 3y)

4. The interval of convergence of the 6. Dimension of the vector space 2 =

( 1)n n 2 x n {( x , y )| x and y are complex
series n 5 is :
n 1 5 n
numbers} over the field of reals

(A) (–5, 5] is :

(A) 4
(B) [–5, 5]
(B) 2

(C) [–5, 5)
(C) 3

(D) (–5, 5) (D) 1

4

7. Let C(R)
R) be the vector space of all 9. If P(D|F) > P(E|F) and P(D| F ) >

continuous real functions over R.
P(E| F ), then the relation between
Then which of the following sets is
P(D) and P(E) is :
linearly independent in C(R
R) ?
(A) P(D) < P(E)
(A) {1, cos 2x, sin2 x}
(B) P(D) = P(E)

(B) {1, ex, e2x}
(C) P (D) < P(E)

(C) {1, x2 – 2x + 1, x2, (x – 2)2}
(D) P(D) > P(E)

(D) {1, log(1 + |x|), log((1 + |x|)2)} 10. Let X be a degenerate random

variable such that P(X = 2) = 1. Then
8. Which of the following is a subspace

of the vector space C[a, b] ? which of the following statements is

true ?
(A) {f C[a, b] | f(a) = 1}

(A) EX = 1, V(X) = 2
b
(B) {f C[a, b] | f (x) d x 0}
a
(B) EX = 2, V(X) = 1
a b
(C) f C[a, b] | f 1
2 (C) EX = 2, V(X) = 0

(D) {f C[a, b] | f(0) = 0} (D) EX = 2, Variance does not exist

5 [P.T.O.

11. Chebyshev’s inequality can be 13. The set of feasible solutions to a
applied to the distribution if it is :
linear programming problem is a :
(A) Any distribution regardless of
(A) Concave set
its shape
(B) Non-empty set
(B) Normal

(C) Exponential (C) Bounded set

(D) Gamma (D) Convex set

12. Let X1, X2 be iid rvs with common 14. In graphical solution method of
pmf
LPP, the redundant constraint is
1
P[X = ±1] = . Let X3 = X1X2.
2 one :
Then which of the following
(A) Which forms the boundary of
statements is correct ?
feasible region
(A) X1, X2 and X3 are mutually

independent (B) Which does not form boundary

(B) X1, X2 and X3 are pairwise of feasible region

independent but not mutually
(C) Which does not optimize the
independent
objective function
(C) EX1 = EX2 = EX3 = 1
(D) Which optimizes the objective
(D) X1, X2 and X3 are not mutually
function
independent

6

15. In graphical solution method of 17. Which of the following functions is
LPP, if two constraints do not
a metric ?
intersect in the positive quadrant of
(A) d ( x , y ) = Min {| x |, | y |},
the graph, then :
x, y R
(A) one of the constraints is
(B) d(x, y) = |x2 – y2|, x, y R
redundant
(C) d(x, y) = |x3 – y3|, x, y C
(B) the solution is infeasible
1 1
(C) the solution is unbounded (D) d(x, y) = , x, y R\{0}
x y

(D) the solution is optimum Or

16. Which of the following is the optimal Which of the following statements

solution to the LPP of maximizing is true, if y = –3x – 7 is the line of

z = x1 + 2x2 regression of y on x ?

subject to (A) The y-intercept is 7

x1 – x2 < 1 (B) The value of y is expected to

x1 + x2 > 3 decrease by 3 when x increases

x1, x2 > 0 by 4 units

(A) (4, 3) (C) The slope of the line is 3

(B) (2, 1) (D) The value of y is expected to

(C) Unbounded solution decrease by 3 when x increases

(D) Infeasible solution by 1 unit

7 [P.T.O.

18. The set R of reals with usual metric 19. Which of the following sets is a
is : perfect set in R2 ?

(A) Connected and complete (A) The set of complex numbers

(B) Compact
(B) The set of all complex numbers
(C) Compact and connected z such that |z| < 1

(D) Complete but not connected
(C) The set of all complex numbers

Or z such that |z| > 1

The simplest linear regression model (D) Q × Q, where Q is the set of
is y = + X + , where is a
rational numbers
random variable with mean µ = 0
2 = 2 . Let X*
Or
and variance

denote a particular value of the The lines of regression of Y on X and

independent variable X. Which of X on Y are given as X + 2Y – 5 = 0

the following statements is true and 2X + 3Y = 8. Then the mean

regarding the variance of Y when values of X and Y respectively
X = X* ? are :
2 2
(A) y| x * (A) 1 and 2

2 2
(B) y| x * x* (B) 2 and 1

2 2
(C) y| x* x* (C) 2 and 5

2 2 2
(D) y| x * (D) 2 and 3
8

20. Consider the set A = 21. Which of the following functions is

1
x sin x (0, 1) as a subset of not of bounded variation on !0, " ?
x # 2$

R. Then : (A) f(x) = sin 2x

(A) A is closed (B) f(x) = sin x + cos x

(B) A is compact (C) f(x) = sin (cos 2x)

(C) A is connected
(D) f(x) = x2 sin 2
x
(D) A is not bounded
Or
Or
If P1 and P2 are two probability
Let A and B be any two events in
measures defined on a measurable
a probability space such that
space (%, F ), then which of the
P(Ac B) = 0.2, P(Bc A) = 0.1,
following statements cannot be true
P(A B) = 0.4. Which of the
always ?
following statements is correct ?
(A) P1(A) = P2(A) for some A F
(A) P(A) = 0.3
(B) P1(A) = 0 & P2(A) = 0
(B) P(Ac Bc) = 0.6
(C) Both (A) and (B)
(C) P(A B) = 0.7
(D) P1(A) > P2(A) A F
(D) P(B) = 0.5

9 [P.T.O.

22. Let u and d be the usual metric and Z(() = ( ( %

discrete metric on R, respectively. Then which of the following is

D efi n e I = ( R, u) R, d) as I(x)
(R true ?
= x for all x R. Then :
(A) All the functions X, Y and Z are

(A) I is bounded random variables

(B) I is not continuous (B) Only X and Y are random

(C) I is continuous but not variables

uniformly continuous (C) Only X is random variable

(D) I is uniformly continuous (D) Only Y is random variable

Or 23. Let z and w be any two complex

Consider a measurable space (%, F) numbers. Then which of the

where % = {1,2, 3, 4}, A = {1, 2} and following is not true ?

F = {', A, A c , %} and define (A) |zw| = |z| |w|

functions : (B) z w z w

X(() = 1 ( % (C) |z| + |w| < |z + w|

0 if ( A z | z|
) ,w +0
Y(() = (D)
w | w|
)1 if ( * A

10

Or Or

Which of the following statements Characteristic function of X is

is not true ? '(u) then characteristic function of

1 b + cX is :
(A) E(X + Y)2 > {EX2 + EY2}
2
(A) eib'(–uc)
(B) If X is integrable, then |X| is

also integrable (B) eiu'(ub)

(C) E(X) may not exist (C) eiub'(uc)

(D) Moments of even order always (D) 1– eiub'(uc)

exist
25. Let C be the circle |z| = 1. Then the

24. The number of zeros of z7 – 4z3 + 2z 3
dz
value of the integral 2
C z 2z 5
z + 1 which lie in the interior of the
is :
unit circle |z| = 1 is :
(A) –1 – 2i
(A) 7
(B) –1 + 2i
(B) 1

(C) 0
(C) 3

(D) 2 + 3i
(D) 0

11 [P.T.O.

Or 26. Let r : [a, b] C be a Lipschitz

function. Then :
A random sample of 15 people is

(A) f is absolutely continuous and
taken from a population in which

of bounded variation on [a, b]
40% favour a particular political

(B) f is absolutely continuous and
stand. What is the probability that

not of bounded variation on
exactly 6 individuals in the sample

[a, b]
favour this political stand ?

(C) f is of bounded variation but not
(A) 0.5000

absolutely continuous on [a, b]

(B) 0.4000

(D) f is neither absolutely

(C) 0.2066
continuous nor of bounded

(D) 0.1600 variation on [a, b]

12

Or Or

A business evaluates a proposed
One of the effects of flooding a lake
venture as follows. It stands to make
is that mercury is leached from the
a profit of Rs. 10,000 with

probability 3/20, to make a profit of soil, enters the food chain, and

Rs. 5,000 with probability 9/20, to contaminates the fish. Suppose that

break even with probability 1/4, and the concentration of mercury in an
to incur a loss of Rs. 5,000 with
individual fish follows an aproximate
probability 3/20. The expected profit
normal distribution with a mean of
is :
0.25 ppm and a standard deviation
(A) Rs. 3,000
of 0.08 ppm. Fish are safe to eat if
(B) Rs. 3,250
the mercury level is below 0.30 ppm.
(C) Rs. 10,000
What proportion of fish would be safe
(D) Rs. 15,000
to eat ?
27. T h e v al u e of l og(2 – 3 i) is :

(A) 23%
(A) log 13 i arc tan (3/2)

(B) 63%
(B) log 13 i[ – arc tan (3/2)]

(C) log 13 i arc tan (3/2) (C) 73%

(D) log 13 i[ – arc tan (3/2)] (D) 27%

13 [P.T.O.

28. Suppose G is open and connected in 29. Let G be a group of order 29.
C and f : G C is differentiable with
Then :
f '(z) = 0 for all z in G. Then :
(A) G need not be abelian
(A) f strictly increasing
(B) G is cyclic
(B) f is not bounded

(C) G is abelian but not cyclic
(C) f is not constant

(D) f is constant (D) G has at least one proper

subgroup
Or

Or
A professional basketball player

sinks 80% of his foul shots in the Marks in a chemistry test follow a

long run. If he gets 100 shots during normal distribution with a mean of

a season, then the probability that 65 and a standard deviation of 12.

he sinks 75 and 90 shots (inclusive Approximately what percentage of

of both) is approximately given the students would score below

by : 50 ?

(A) P[–1.25 < Z < 2.50] (A) 22%

(B) P[–1.125 < Z < 2.625] (B) 11%

(C) P[–1.375 < Z < 2.375] (C) 15%

(D) P[–1.375 < Z < 2.635] (D) 18%

14

30. Let G be a finite group and p|O(G), Or

Let X1, X2, ....... Xn be a random
where p is a prime. Then :

sample from N(µ, 2), where , and

(A) if pk|O(G) and H is a subgroup
2 are unknown. Then which of the

of G of order pk, then H is cyclic following statements is not correct ?

(A) ( Xi, X12) is jointly sufficient
(B) for every integer i such that

for (,- 2)

pi|O(G), G has a subgroup of

(B) X is sufficient for µ and S2 is
order pi
sufficient for 2

(C) G has a normal subgroup of
(C) (X, S 2 ) is jointly sufficient for

(µ, 2)
order p

(D) if 2 is known, then
X is
(D) if k is largest integer such that

sufficient for µ and (Xi – µ0)2
pk|O(G), then G has a normal
is sufficient for 2 if µ = µ is
0

subgroup of order pk
known

15 [P.T.O.

31. The number of all group
32. Which of the following is false ?
homomorphisms from the group Z8
into the group Z20 is :
(A) Every PID is UFD
(A) 8
(B) 1 (B) Every UFD is Euclidean
(C) 4
(D) 0 domain

Or
(C) Every Euclidean domain is
Let X1, X2, ....., Xn be a random
sample from Poisson distribution UFD
with parameter .. Then T = Xi is
sufficient for .. The distribution of (D) Every Euclidean domain is PID
X1 given T = t is :

t 1
x1
1
t x1
Or
(A) x1
1 ; x1 = 0, 1,
n n
If X1, X2 are distributed as B(n, p),
2 ......n

n .
x1
.
n x1 n known and 0 < p < 1, the number
(B) x1
1 ; x1 = 0,
n n
of unbiased estimators of p is :
1, 2, ......n

1
x1
1
t x1 (A) 2
t
(C) x1
1 ; x1 = 0, 1,
n n
(B) infinity
2, ......t
x1 n x1
n 1 1 (C) 4
(D) 1 ; x1 = 0,
x1 . .

1, 2 ......n (D) 6

16

33. Which of the following groups has 34. The mapping ' : Z5 Z5 satisfying

trivial centre ? '(2) = 3 is a group homomorphism.

Then :
(A) A non-abelian simple group
(A) '(1) = 1
(B) A group of order prime
(B) '(1) = 2
(C) A group of order p3 where p is
(C) '(1) = 0
prime
(D) '(1) = 4
(D) The group of non-singular n × n
Or
matrices over R
For a large n (> 30), the confidence
Or 2)
interval for mean µ of a N(µ,

distribution when 2 known, is :
Let X1, X2, ...... Xn be a random

sample from U(/, / + 1). The number 2 2

(A) ! X Z ,X Z "
of maximum likelihood estimators of #! 1
2
n 1
2
n $"

/ is :
(B) ! X Z ,X Z "
!# 1
2 n 1
2 n "$
(A) Infinity
2 2
(B) 2 (C) ! X Z ,X Z "
#! 2 n 2 n $"

(C) 5

(D) ! X Z ,X Z "
(D) 7 #! 2 n 2 n $"

17 [P.T.O.

36. Which of the following polynomials
35. Let V be the set of all n × n skew-
is the characteristic polynomial of a
symmetric matrices over R. Then V matrix that is not invertible ?

is a real vector space of dimension : (A) x3 + 2x – x + 1

(B) x3 + x
n (n 1)
(A)
2 (C) x4 + x3 – 2x2 + 5

n (n 1) (D) (x + 1) (x – 2) (x + 2)
(B)
2
Or
(C) n 2 Let X1, ......, X n1 and Y1, ....., Yn2 be

(D) n2 – n two independent random samples
from two normally distributed
Or populations with parameters (µ1,
2 2
Let X1, X2, ......, Xn be iid rvs from 1 ) and (µ2, 2 ) respectively. Then
the null distribution of the usual test
U(0, /). Then which of the following
statistic for testing the equality of
statements is true ? Let 2 2
1 and 2 , when µ1 and µ2 are
X(n) = Ma x Xi unknown, is :
i
(A) Standard normal
(A) X (n ) is consistent estimator
(B) F-distribution with (n1 – 1,
for /
n2 – 1) degrees of freedom
(B) X(n) is unbiased estimator for / (C) t with n1 + n2 – 2 degrees of
freedom
(C) X(n) is not sufficient for /
(D) square of Chi-square random
(D) X(n) is not maximum likelihood variable with n1 + n2 –1 degrees
estimator of / of freedom
18

37. Let Pn(x) be the vector space of all 38. Which of the following statements
polynomials of degree atmost n with
is false ?
real coefficients. Then its dimension
(A) Consider vector space C over C.
is :
Then for any scalars , ; .1
(A) n – 1
+ .i = 0 if and only if = 0
(B) n

(C) n + 1 and = 0.

(D) n 2
(B) The set M = {f C[0, 1] | f 1
2
Or
= 0} is a subspace of the real
In 2×2 contingency table to test

independence of two attributes, if vector space C[0, 1].

only one of the cell frequency is less
(C) Let V(F) be any vector space.
than 5, then :
Then for any a F and for any
(A) Pooling of cell frequencies is
vector x V; x 0 if and
used to carry out the test

(B) Fisher’s correction is used to only if = 0 or x 0

carry out the test
(D) The class of all polynomials with
(C) Yates’ correction is used to carry
real coefficients is a real vector
out the test
space.
(D) The test cannot be carried out

19 [P.T.O.

Or Or

A test for testing H0 against H1 is If the form of the distribution from
called level test if :
which the sample is drawn, is known
(A) size of the test does not exceed
completely except the unknown

parameter /, which of the following
(B) size of the test is exactly equal
statements is true ?
to

(A) MLE, the maximum likelihood
(C) the hypothesis of the test is

simple hypothesis estimator of / exists only if

(D) the test is unbiased support of the random variable

39. Let u and v be vector spaces of is free from /

dimensions m and n, respectively.
(B) MLE of / exists only if / is a
Then dimension of the space
real valued parameter
Hom(v, u) is :

(A) m + n (C) MLE of / exists only if the

(B) nm distribution belongs to the

exponential family
(C) m n

(D) mn (D) MLE of / always exists

20

40. The general solution of the PDE 41. The particular integral of the

equation r – 2s + t = cos (2x + 3y)
(y – z)p + (z – x)q = x – y
is :
is :
(A) cos (2x + 3y)
(A) '(x2 – y2 – z2, x – y – z) = 0

(B) sin (2x + 3y)
(B) '(x + y + z, x2 + y2 + z2) = 0

(C) '(xyz, x2 + y2 + z2) = 0 (C) – cos (2x + 3y)

(D) '(x + y + z, x2 + y2 + z2) = 0 (D) – sin (2x + 3y)

Or Or

A single observation from N(µ, 1) In probability sampling, all units
resulted in 2.33. It is decided to test get :
the hypothesis that H 0 : µ = 0
(A) always unequal chances to be
against H1 : µ > 0 using this single
selected
observation. What will be the

p-value in this case ? (B) always an equal chance to be

(A) 0.05 selected

(B) 0.95 (C) a chance to be included in the

(C) 0.99 sample

(D) 0.01 (D) always selected using SRSWOR

21 [P.T.O.

42. The characteristic curve of the PDE 43. The solution of the equation

2 2
0 z 0 z (1 + y2)dx = (tan–1 y – x)dy
2 2
0
0x 0y
is :
is :
tan 1 y
(A) x = tan–1 y – 1 + c e
(A) u = y – x, v = y – x2
1
(B) y tan 1 x c e tan x
(B) u = y + x, v = y – x2 1

1

(C) u = y – x, v = y2 + x (C) x tan 1 y c e tan y

1
(D) u = y + x, v = y – x (D) y tan 1 x c e tan x

Or Or

Sampling error : In SRSWOR of size n from a

(A) arises because of wrongly population of size N, the number of
reported data
distinct samples which will contain
(B) arises due to mistakes made by
a specific population unit is :
field workers
N–1
(A) n 1
(C) increases with increase in
sample size N
(B) n
(D) may arise due to non-
N
representativeness of the (C) n 1
samples and the inadequacy of
(D) n !
sample size

22

44. If y1(x) and y2(x) are solutions of the 45. Under usual notations, variance of
equation y" + 2y' + (1 – x)y = 0 such
estimator of population mean based
that y1(0) = 0, y'1(0) = 1, y2(0) = 1,
on stratified random sample is :
y'2(0) = 1, then the value of the
L
1 1
Wronskian W(y1, y2) on R is : (A) V(Yst ) = s h2 w h2
h 1 nh Nh
(A) –1
L
1 1
(B) 0 (B) V(Yst ) = s h2 ch2
h 1 nh Nh
(C) 1
L
1 1
(D) 2 (C) V(Yst ) = s2w 2
h 1 Nh nh h h
Or
L
1 1
In stratified sampling with stratum (D) V(Yst ) = s 2N 2
h 1 Nh nh h h
sizes N 1 = 800, N 2 = 300 and
Or
stratum variances s12 = 144, s22 =
If there are n jobs to be performed,
400, under Neyman allocation, the

n1 one at a time, on each of m
ratio of sample sizes n is given by :
2 machines, the possible sequences
8 would be :
(A)
5
8 (A) (n!)m
(B)
3
(B) (m!)n
3
(C)
4 (C) (n)m
3
(D) (D) (m)n
8

23 [P.T.O.

46. If C is the initial cost of an item, 47. For M/M/1 queueing system, the

then the discounted value (d) of all expected number of customers in the

future costs associated with the system are (Here µ service rate and

policy of replacing the item after n . arrival rate) :

years is given by : ,
(A) L = , .
(A) Dn = c/(1 + d)n
. ,
(B) L =
.
(B) Dn = c/(1 + dn)
.
(C) L = , .
(C) Dn = c/(1 – d)n
.
(D) Dn = c/(1 – dn) (D) L = ,(, .)

Or Or

In Latin square design, there What is the error degrees of freedom

are : in Latin square design (assuming

there are p treatments) :
(A) Four sources of variability
(A) (P – 1)
(B) Three sources of variability
(B) P2 – 1
(C) One source of variability
(C) (P – 2) (P – 1)
(D) Two sources of variability
(D) P – 2

24

48. Find the value of p, q and r if the 49. For a transportation problem,
primal problem is
choose the statement which is not
Maximize Z = px1 + 2x2
Subject to correct :
x1 + x2 < q
x1 – x2 < 2 (A) The ui + vj – Cij value of an
x1, x2 > 0 unoccupied cell indicates the net
and the corresponding dual problem
change in cost of re-allocating
is
Minimize Z* = 3w1 + 2(2 one unit through the route
Subject to
involved
w1 + w2 > 4
w1 – w2 > r (B) Any of m + n – 1 number of
w1, w2 > 0
occupied cells would allow
(A) (4, 1, 3)
(B) (3, 4, 2) determining whether a given
(C) (2, 4, 3) solution is optimum or not
(D) (4, 3, 2)
Or (C) The maximum quantity that
In 22 factorial design, let A and
can be re-allocated in a closed
B be two factors each having
two levels each with single path is equal to the minimum

replication and interaction effect quantity in the cells bearing
is included. Then error degrees
negative sign
of freedom is :
(A) 1 (D) In time minimization problem,
(B) 2
the cost Cij is replaced by the
(C) 3
(D) 0 unit time tij

25 [P.T.O.

50. In game theory, which of the
Or following is not correct ?

(A) The constant value, if added to
each element of the pay off
In BIBD, the number of blocks matrix to formulate the given
problem as an LPP, should be
substracted from the value of
is :
the game, determined from the
solution to the LPP

(A) greater than or equal to (B) Every two person zero sum
game cannot be represented by
a pair of LPP’s with primal dual
number of plots relationship

(C) Any two person game can be
formulated and solved as an
(B) greater than or equal to LPP

(D) In a 2×n and m×2 game, each
number of treatments of the players can mix at most
two strategies if the multiple
optimum solutions do not
exist
(C) less than or equal to number of
Or

plots In BIBD, if the number of
treatments is equal to the number
of plots in a block, then BIBD :

(D) less than or equal to number of (A) reduces to CRD
(B) reduces to RBD

treatments (C) reduces to LSD

(D) reduces to Graeco LSD
26

ROUGH WORK

27 [P.T.O.

ROUGH WORK

28