Two Children Puzzle

I ask people at random if they have two children and also if one is a boy born on a tuesday. After a long search I finally find someone who answers yes.

What is the probability that this person has two boys?

Assume an equal chance of giving birth to either sex and an equal chance to giving birth on any day.

SherlockHolmes Expert Asked on 10th January 2018 in Math Puzzles.
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  • 1 Answer(s)


    The person already had 1 boy. So the chance of other child to be a boy is 1/2 .

    dyj Expert Answered on 11th January 2018.
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