Question

How many 3 letter words, with or without meaning can be formed using the letters of the word JOURNALIST if repetition is not allowed?

A) 40 320
B) 56
C) 256
D) 512​

Answer 1

720 ways

Explanation:

Word : JOURNALIST = 10

Number of letters = 3

Using permutation formula:

10P3

Recall : nPr = n! / (n-r)!

10P3 = 10! / (10 - 3)!

10P3 = 10! / 7!

10P3 = 10 * 9 * 8

10P3 = 720 ways