A couple has six children. Assuming boys and girls are equally likely, what is the probability that they have fewer than 4 girls?
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Originally Posted by sftball A couple has six children. Assuming boys and girls are equally likely, what is the probability that they have fewer than 4 girls? Let X be the random variable number of girls. X ~ Binomial(n = 6, p = 1/2). Calculate $\displaystyle Pr(X < 4) = 1 - \Pr(X \geq 4)$.
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