Puzzles

Can You Solve The Identical Or Fraternal Twins Logic Puzzle?

How good are your probability calculation skills? In this logic puzzle from Presh Talwalkar of the MindYourDecisions YouTube channel, that's the name of the game. Scrolls down to read the puzzle and give it a shot. Good luck!

Here's The Puzzle

Aryabhata mentioned that he has a twin brother named Bhaskara. Let's say that one out of every ten sets of twins are identical, which then means that nine of out every ten sets of twins are fraternal. What's the probability that Aryabhata and Bhaskara are identical twins?

Here is some additional information: Identical twins develop from a single fertilized egg and have the same sex. Fraternal twins, on the other hand, develop from two fertilized eggs. For this puzzle, suppose that the sex of each fraternal twin is independently determined and is equally likely to be male or female. Suppose that identical twins are equally likely to be male or female.

Watch the video below to learn how to solve this problem, or just scroll down to check your answer.

Can You Solve The Identical Twins Riddle? Paradoxical Probability Puzzle

Here's The Answer

There is a 2/11 chance, roughly 18,2% chance, that Aryabhata and Bhaskara are identical twin brothers. Watch the video above to learn how you can arrive at this answer.

Written By Curiosity Staff August 18, 2017