If a letter is selected at random from the letters of the word "FOUNDATION" what is the Probability of the letter selected being a repeated letter? PLEASE give a detailed solution. Thank You.
closed as off-topic by Saad, NCh, Remy, The Phenotype, Parcly Taxel Feb 28 '18 at 8:43
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$F's=1,O's=2,U's=1, N's=2, D's=1, A's=1, T's=1, I's=1 $ There are are 10 letters in all. Number of repeating letters are $4$. So the probability is what?