How many words with or without meaning can be formed by using all the letters of the word ‘NCFSE’ using each letter exactly once?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 120
The five letters N, C, F, S and E are all different and each is used once, so every word is an arrangement of 5 different letters in 5 places.
The first place can take any of the 5 letters, the second any of the 4 left, then 3, 2 and 1
Number of words \(=5!=5\times4\times3\times2\times1=120\)