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  4. How many words beginning with T and ending with E can be made (with no letter repeated) out of the letters of the word 'TRIANGLE' ?

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Q. How many words beginning with T and ending with E can be made (with no letter repeated) out of the letters of the word 'TRIANGLE' ?

Permutations and Combinations

Solution:

In 'TRIANGLE' there are 8 letters. T- - - - - - E, remaining 6 letters which can be arranged by 6! ways = 6 . 5 . 4 . 3 . 2 . 1 = 720.