Question 97

How many words can be formed from the 3rd, 4th, 5th, 7th, and 8th letters of the word " ALPENSTOCK " by using each letter at most once in the word?

Solution

The letters that can be used are: " P, E, N, T, O ".

The possible words that can be formed include:  " PEN ", " PET ", " NET ", " PENT ", " TEN ", " OPEN ", " PEON ",  " POET ", " NOTE ",....

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