Question

15. The number of words that can be formed by using all
the letters of the word 'PROBLEM' only once is :
(A) 5!
(B) 6!
(C) 7!
(D) 8!
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Answer 1

Answer:

7

Step-by-step explanation:

The word PROBLEM has 7 letters viz. P, R, O, B, L, E, M

∴ Total number of words that can be formed by using all the letters only one = Number of arranging the seven letters = 7!