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westerngravity
Answers (2)
The total number of possibilities out of 400 that result in Bret winning is 1 + 2 + 3 + 4 + 5 + 6 + 7+ 8 +9 = 45. The probability of Bret winning is 45/400 = 9/80 (using coprime numbers) Therefore a = 9 and b = 80. a + b = 89
The total number of possibilities out of 400
