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01-01-2018
Mathematics

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Suppose a family has four children. What is the probability that at least two are female?

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Аноним Аноним

01-01-2018

P(all 4 are male) = 1/2^4 = 1/16 ( assuming probability of 1 male = 1/2)

P( 3 are male) = 1/2^4*4 = 1/4

The rest will have at least 2 females

So probability of at least 2 females) = 1 - 1/16 - 1/4 = 1 - 5/16 = 11/16 answer

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