How many words (with or without dictionary meaning) can be made from the letters in the word MONDAY, assuming that no letter is repeated, if
4 letters are used at a time?
Given: the word is ‘MONDAY.’
Total number of letters in the word = 6
To find: possible number of four-letter words can be made using the letters of the word ‘MONDAY.’
Formula used:
Number of arrangements of n things taken r at a time = P(n, r)
∴ Total number of arrangements
= the number of arrangements of 6 things taken 4 at a time
= P(6, 4)
= 6 × 5 × 4 × 3
= 360
Hence, the total number of four-letter words can be made by letters of the word ‘MONDAY’ = 360