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Peter purchased a pentagonal pen for his puppy Piper. Now Peter wants to decorate the new pen for Piper, and he would like to paint each side of the pen either red, green, or blue so that each wall is a solid color. Peter can only paint at night when Piper is sleeping, and unfortunately it is too dark for him to determine which color he is painting. So for each wall, Peter randomly chooses a can of paint and paints the wall in that color. In the morning, Peter observes the resulting color scheme. What is the probability that no two adjacent walls of the pen have the same color?

 

 

The answer is 10/81 and not 16/81, the answer from 2019 is incorrect trust me brodie don't fall for it.coolcoolcool

 Nov 25, 2022

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