Q. 14 If X ~B(10 ,0 ,4) then find E(X) and var(X).
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Answer:
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
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