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Sum probability

Author: admin
Problem has been solved: 75 times

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The numbers $ a $ and $ b $ are given such that $ 0 \leq a \leq 4 $ and $ 0 \leq b \leq 8 $. The probability that $ a + b \leq 4 $ can be represented as a fraction of $ \frac {m} {n} $, where $ m $ and $ n $ are coprime natural numbers. What is the sum of $ m + n $?





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