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interview question re: expected value
Posted:
Nov 6, 2011 3:38 PM


Hey, I found this problem from a list of questions for a job interview.
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.



