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Please solve this question

Please solve this question-example-1
User Victor Trusov
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1 Answer

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6 votes

Hello,


\boxed{P(X = k) =( {}^(n) _(k)) * p {}^(k) * (1 - p) {}^(n - k) }


P(X= k) = ( {}^(12) _(6)) * 0.51 {}^(6) * (1 - 0.51) {}^(12 - 6)

We have :


( {}^(n) _(k)) = (n!)/(k!(n - k)!)


( {}^(12) _(6)) = (12!)/(6!(12 - 6)!) = (12!)/(6!6!) = (12 * 11 * 10 * ... * 1)/(2(6 * 5 * 4 *... * 1) ) = (12 * 11 * 10 * 9 * 8 * 7 )/(6 * 5 * 4 * 3 * 2 * 1) = 924


P(X = k) = 924 * 0.51 {}^(6) * 0.49 {}^(6) = 0.2250

User Pavel Alazankin
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