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Find the probability of selecting each of the following...

Each individual letter of the word "pfeffernuesse" is placed on a piece of paper, and all 13 pieces of paper are placed in a hat. Three letters are selected at random from the hat. Find the probability of selecting each of the following.

a) with replacement b) without replacement

1) Pulling Three "F's"

2) No "F"

3) Three vowels

4) The first letter is not a vowel and the second and third letters selected are vowels.

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