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GMAT Challenge Problem 1: Probability

Suppose we roll three fair dice - a red die, a yellow die, and a blue die. What is the probability the the sum of the upturned faces on the red and yellow die is smaller than the upturned face on the blue die?

A. 10/33

B. 5/54

C. 7/72

D. 1/3

E. 11/24