Puzzles & Quizzes

Can You Solve the Newborn Baby Probability Puzzle?

Time to dust off those probability math skills you sharpened in high school: This is a hard one. It's the probability puzzle presented by Presh Talwalkar of the MindYourDecisions YouTube channel that he says has been asked as an interview question.

Here's the Puzzle

Here's the problem: On the morning of January 1, a hospital nursery has 3 boys and some amount of baby girls. That night, a child is born and is placed in the same nursery along with the other babies. On January 2, a child is selected at random from the nursery. The child is a boy. What is the probability the child born on January 1 was a boy? Get the answer by watching the video below.

Can You Determine the Probability That the Newborn Is a Boy?

You want a tough problem? Here ya go.

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Written by Curiosity Staff November 21, 2016

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