A couple has 2 kids where they know that one's a boy, what's the probability of the other kids being a boy?

Question

Anonymous · Accepted Answer

the probability is 25 percent. It's a Bernouli scheme, same as with flipping the
coin 50/50. Initially it's 50% vs 50%. The question is about "what's the
probability of outcome Boy on the second trial?". So we take 0.5 to the power of
2.

Anonymous · Answer

50%; kids' gender are independent events; there are only 2 possible outcomes, so
1/2 = 50%

A couple has 2 kids where they know that one's a boy, what's the probability of the other kids being a boy?

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