A r.v. X assumes values 1, 2, 3, …, n with equal probabilities. If Var (X) = 4 E (X), then n =

A r.v. X assumes values 1, 2, 3, …, n with equal probabilities. If Var (X) = E (X), then n =

If a r. v. X assumes the values 1,2,3,…………,9 with equal probabilities then E(x) = 5.

A r.v.X assumes values 1,2,3….n with the equal probabilities. (ii) What will be n if var(x)=E(x) .

Random variable X takes integer values from 1 to n with equal probabilities then E(X) = ………..

Let X be a random variable taking values x_(1), x_(2), x_(3), ......., x_(n) with probabilities p_(1), p_(2),p_(3),………, p_(n) respectively. Then var (X) = ………..

If X be a random variable taking values x_(1),x_(2),x_(3),….,x_(n) with probabilities P_(1),P_(2),P_(3) ,….. P_(n) , respectively. Then, Var (x) is equal to …….. .

If X be a random variable taking values x_(1),x_(2),x_(3),….,x_(n) with probabilities P_(1),P_(2),P_(3) ,….. P_(n) , respectively. Then, Var (x) is equal to …….. .