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Find the probability that when a couple has four four ​children, at least one of them is a girl girl. ​(assume that boys and girls are equally​ likely.)
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Find the probability that when a couple has four four ​children, at least one of them is a girl girl. ​(assume that boys and girls are equally​ likely.)

User Abora
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Knowing that each gender has a 50/50 chance there are four in five chance that at least one is a girl. The sequences are BBBB,GGGG,BBGG,BBBG, and GGGB.
User Javlon
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