MathDB
2021 Spring LMT Division B Problem 3

Source:

January 22, 2022
combinatorics

Problem Statement

Aidan rolls a pair of fair, six sided dice. Letn n be the probability that the product of the two numbers at the top is prime. Given that nn can be written as a/ba/b , where aa and bb are relatively prime positive integers, find a+ba +b.
Proposed by Aidan Duncan