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Given that X ~ B(n = 10, p). If E(X) = 8 then the value of p is(A) 0.6 (B) 0.7 (C) 0.8 (D) 0.4 |
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Answer» (C) 0.8 n = 10, E(X) = 8 ....(given) But, E(X) = np ∴ 8 = 10 (p) ∴ p = \(\frac{8}{10}=\frac{4}{5} = 0.8\) |
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