Given that X B (n=10, p), if E ( X )=8, find the value of p. - Vidyadip

Question

Given that $X \sim B (n=10, p)$, if $E ( X )=8$, find the value of $p$.

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Answer

$\begin{aligned} & X \sim B(n=10, p) \\ & \therefore E(X)=n p \\ & 8=10 p \\ & p=0.8=\frac{4}{5}\end{aligned}$

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