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A comment on The question is wrong. Parent comment
You mean, if you only specify that at least one child is a girl, then it's 1/3.
Actually you're still underspecified, because you haven't said what you do if the parent has no girls.
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You mean, if you only specify that at least one child is a girl, then it's 1/3.
Actually you're still underspecified, because you haven't said what you do if the parent has no girls.