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Find the number of 4 letter words which can be formed from word PULSE without repetition.

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in Mathematics - Class 11 by (789k points)
Find the number of 4 letter words which can be formed from word PULSE without repetition.

(a) 20

(b) 60

(c) 120

(d) 240

I have been asked this question in an international level competition.

My question is from Fundamental Principle of Counting in section Permutations and Combinations of Mathematics – Class 11

1 Answer

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The correct answer is (c) 120

Easy explanation: PULSE is a 5 letters word. By the fundamental principle of counting, total number of possible words without repetition are 5*4*3*2 = 120.

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