Princeton - Probability 2

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Princeton - Probability 2

by tutonaranjo » Thu Sep 20, 2007 11:59 am
As part of a game, four people each must secretly choose an integer between 1 and 4, inclusive. What is the approximate likelihood that all four people will choose different numbers?
a) 9%
b) 12%
c) 16%
d) 20%
e) 25%

Answer is A. Someone help with detailed explanation!
thanks in advance
Source: — Problem Solving |