1.

Given X ~ B( n, p) if p =0.6 E(X) =6, then the value of Var (X) isA. `2.4`B. `2.6`C. `2.5`D. `2.3`

Answer» Correct Answer - A
E(x)=np.
`implies6=n(0.6)`
`impliesn=(6)/(0.6)=10`
`impliesq=1-p=1-0.6=0.4`
`:.Var(x)=npq=10xx0.6xx0.4=2.4`


Discussion

No Comment Found

Related InterviewSolutions