If \(\rho (A)=\rho (A,B)\) the number of unknowns, then the system is______.

(a)

Consistent and has infinitely many solutions

(b)

Consistent and has a unique solution

(c)

consistent

(d)

inconsistent

\(\int _{ 0 }^{ 1 }{ (2x+1) } dx\) is _______.

(a)

1

(b)

2

(c)

3

(d)

4

Lagrange’s interpolation formula can be used for _______.

(a)

equal intervals only

(b)

unequal intervals only

(c)

both equal and unequal intervals

(d)

none of these.

E[X-E(X)]² is ________.

(a)

E(X)

(b)

E(X²)

(c)

V(X)

(d)

S.D(X)

If X is a continuous random variable. then P(X≥a)= _________.

(a)

P(C)

(b)

1-P(X>a)

(c)

P(X>a)

(d)

1-P(X≤a-1)

The random variable X is normally distributed with a mean of 70 and a standard deviation of 10. What is the probability that X is between 72 and 84?

(a)

0.683

(b)

0.954

(c)

0.271

(d)

0.340

If Z is a standard normal variate, then p(0

(a)

0.5

(b)

1

(c)

0.25

(d)

0.75

If a random sample of size 64 is taken from a population whose standard deviation is 32, then the standard error of the mean is __________

(a)

0.5

(b)

2

(c)

4

(d)

32

Choose the odd one out

(a)

Secular trend

(b)

seasonal variation

(c)

Simple averages

(d)

cyclic variations

______ method provides optimum assignment schedule in an assignment problem.

(a)

North West Corner

(b)

Least cost

(c)

Vogel's Approximation Method

(d)

Hungarian Method