CS/B.TECH(NEW)(CSE/IT)/SEM-4/M-401/2012
2012
MATHEMATICS-III
Time Allotted : 3 Hours Full Marks : 70
The figures in the margin indicate full marks.
Candidates are required to give their answers in their own words
as far as practicable.
GROUP – A
(Multiple Choice Type Question)
1. Choose the correct alternatives for the following: 10 x 1 = 10
i) If PA=13, PB=14 and PA∪B=12, then P(B|A) is
a) 34 b) 43
c) 14 d) 13
ii) The variance of a random variable x is
a) {Ex}2 b) E(x2)
c) Ex2-{Ex}2 d) Ex2-Ex.
iii) A statistic t is said to be an unbiased estimator of a population parameter 0 when
a) Et=θ b) Et2=θ
c) E(t2)={Eθ}2 d) {Et}2=Eθ2 .
