In a meeting.70% of the members favour and 30% oppose a certain proposal.A member is selected at random and we take X=0 if he opposed,and X=1 if he is in favour.Find E(X) and Var(X).

Given that X~B(n,p) (i)If n=10 and p=0.4,find E(X) and Var(X).

If a r.v. X has p.d.f., f(x)=c/x , for 1 0 , find c, E(X) and var(X)

Given X~B(n,p)(ii)If P=0.6,E(X)=6,find n and Var(X).

Ina certain town, 40% of the people have brown hair, 25% have brown eyes, and 15% have both brown hair and brown eyes. If a person selected at random from the town has brown hair, the probability that he also has brown eyes is 1//5 b. 3//8 c. 1//3 d. 2//3