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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` |
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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` |
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