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 x 7 x 7 x 7

= 2401

∴ 2401 four-lettered words can be formed when repetition of letters is allowed.