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+1 vote
15.1k views
in Permutations and Combinations by (47.9k points)

How many words can be formed using letters of word TRIANGLE ? Out of these how many words begin with T and end with E ?

1 Answer

+2 votes
by (46.2k points)
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Best answer

There are 8 letters in the given word, in which there is no repetition of any letter.

Hence, the number of words formed by these letters are = (8)! = 40320

If we fix the position of T in starting and E at the end, then the number of remaining letters = 6

Hence, number of words formed by these letters = (6)! = 720

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