PBS Infinite Series

How Many Humans Have the Same Number of Body Hairs?

2016 • E3    Nov 30, 2016    13m
Do two people on the planet have the exact same number of body hairs? How about more than two? There’s a simple yet powerful mathematical principle that can help you find out the answer. Kelsey Houston-Edwards breaks down the Pigeonhole Principle and explains how it can be used to answer some pretty perplexing questions.

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