Statistics

If you know for certain that a friend of yours has 2 children and that atleast one of them is a boy, what is the probability that the other is also a boy?

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DigitalOcean

ASML

Calm

Adyen

Coursera

Qualcomm

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Answers

Anonymous

3.8Strong
The possible cases are boy boy, boy girl, girl girl, girl boy. Given one of the kids is boy, there are 3 cases. There is only one case that another kid is a boy so the probability is 1/3
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Interview question asked to Data Scientists interviewing at Qualcomm, Noom, Coupang and others: If you know for certain that a friend of yours has 2 children and that atleast one of them is a boy, what is the probability that the other is also a boy?.