Question

How many 4 letter words can be formed using letters in the word MADHURI if letters can be repeated?

Answer 1

There are 7 letters in the word MADHURI.

A 4 letter word is to be formed from the letters of the word MADHURI and repetition of letters is allowed.
∴ 1^st letter can be filled in 7 ways.
2^nd letter can be filled in 7 ways.
3^rd letter can be filled in 7 ways.
4^th letter can be filled in 7 ways.
∴ Total no. of ways a 4-letter word can be formed = 7 × 7 × 7 × 7 = 2401
∴ 2401 four-lettered words can be formed when the repetition of letters is allowed.