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Find the number of 4 letter words which can be formed from word PULSE if repetition is allowed.

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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 if repetition is allowed.

(a) 120

(b) 125

(c) 625

(d) 3125

I got this question during a job interview.

The query is from Fundamental Principle of Counting topic in section Permutations and Combinations of Mathematics – Class 11

1 Answer

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Best answer
Correct option is (c) 625

To elaborate: PULSE is a 5 letters word. By the fundamental principle of counting, total number of possible words with repetition allowed are 5*5*5*5 = 625.

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