Question

How many words, with or with out meaning, can be formed using all letters of the word equation using each letter exactly once?

Answer 1

Number of letters in equation =8

Number of letters to be taken at a time =8

If P is the number of words thus formed,then

P=P(8,8)=8!(8−8)!P=P(8,8)=8!(8−8)!

⇒8!⇒8!

⇒8×7×6×5×4×3×2×1⇒8×7×6×5×4×3×2×1

⇒40320⇒40320

Hence (C) is the correct answer.