Question

The number of words that can be formed by using all the letters of the word $PROBLEM$ only one is

• A. 5!
• B. 6!
• C. 7!
• D. 8!

Answer 1

Answer: (C)

7!

Answer 2

The word '$PROBLEM$' has $7$ letters viz. $P, R, O, B, L, E, M$
$\therefore$ Total number of words that can be formed by using all the letters only one = Number of arranging the seven letters $=7 !$