ISRO 2012- ECE Probability

Question

a) 0 & 1

b) 1 & 2

c) 1 & 4

d) None of these

Answer 1

Answer is C) E(ax + b) = aE(x) + b so Y' = 2(0)+1 = 1

And Variance( ax + b) = a^2 Variance(x) so Variance(Y) = 4 Variance (Y) = 4

https://revisionmaths.com/advanced-level-maths-revision/statistics/expectation-and-variance