100 Day Summer Challenge

100 problems in 100 days. #100problems

Day 96

96 of 100: Murphy's Probability

Probability Level 1

Three people all set down their identical notebooks on a table. On the way out, they each randomly pick up one of the notebooks. What is the probability that none of the three people pick up the notebook that they started with?

A chart or table may help sort through the possibilities in this scenario.


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