Statistics

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 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, or by scrolling down to read the answer. Good luck!

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Can You Determine The Probability That The Newborn Is A Boy?

You want a tough problem? Here ya go.

ANSWER

There is a 50.5% chance the child born on January 1 was a boy. Watch the video above to learn why.

Can You Solve Car Probability Question?

This question has been asked in interviews for Google.

Can You Solve The Alien Extinction Riddle?

Here's another tough one for you to try.

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