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Topic: interview question re: expected value
Replies: 5   Last Post: Nov 22, 2011 5:47 AM

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Posts: 4
Registered: 6/10/08
interview question re: expected value
Posted: Nov 6, 2011 3:38 PM
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Hey, I found this problem from a list of questions for a job

I roll a die. If I don't like the number, I can roll again, for a
maximum of two rolls. What is the expected value of my roll, assuming
I play rationally?

I've seen proffered answers of 4.25 and 4 2/3, and was wondering how
they were obtained.

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