Operation Research Interview Questions

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A group of people pick hats from two stacks. Each stack has a different color. And then people are standing in a line in ascending height. People on the back can see the color of hat on the people in front of him/her. And then they need to guess what color his hat is. Given a set of answers from the previous 4 people, the 5th people know for sure the color of his hat. Why?
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Operations Research Co-op

Interviewed at Norfolk Southern

2.9
Mar 29, 2018

A group of people pick hats from two stacks. Each stack has a different color. And then people are standing in a line in ascending height. People on the back can see the color of hat on the people in front of him/her. And then they need to guess what color his hat is. Given a set of answers from the previous 4 people, the 5th people know for sure the color of his hat. Why?

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