# Probability of A

An array contains 4 letters, {$$A, B, C, D$$}. A computer randomly picks 50 letters from the array, where the probability of selecting each letter is equal. 17 of these letters are an $$A$$, 9 are $$B$$, 10 are $$C$$ and 13 are $$D$$.

Find the probability that the unknown letter is an $$A$$. Write your answer correct to 2 decimal places.

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