How many four letter permutations can be formed from the first five letters of the alphabet

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How many four-letter permutations can be formed from the first five letters of the alphabet?

How many four letter permutations can be formed from the first five letters of the alphabet

. 7*6*5*4 = 840 ways. Any of 7 letter in the 1-st position. 7 opportunities. Any of remained 6 letters in the 2-nd position. 6 opportunities Any of remained 5 letters in the 3-rd position. 5 opportunities. Any of remained 4 letters in the 4-th position. 4 opportunities.

How many four letter permutations can be formed from the first five letters of the alphabet

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