Question

n.
c) If X - B(n,p), E(x) = 12,V(X) = 4 then find value of 1​

Answer 1

Step-by-step explanation:

Given X∼B(n,p),n=10,p=0.4

We know that p+q=1⇒q=1−q⇒q=1−0.4=0.6

E(X)=np=10×0.4=4

V(X)=npq=10×0.4×0.6=2.4