Math Stinger # 133
by Steve Edwards, Professor of Mathematics

This time, a simple probability question.
Suppose a pair of fair dice is rolled again and again until either a total of
7 or a total of 5 comes up.  Find the probability that 5 occurs first.

Send your solution  to sedwards@spsu.edu, or by snail mail to Steve Edwards in the Math 
Department.   The names of the first solvers will be posted here.

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