Question

How many different 4 – letter words can be formed with the letter of the word ‘MUNCH’ when U & N are always to be included ? 
1. 72
2. 62
3. 12
4. 42
5. 32

Answer 1

Correct Answer - Option 1 : 72

Given

5 letter word MUNCH is given

Calculation

Since U and N are always included so first we select 2 letters from remaining 3 letters(M, C and H), which can be done in ³ C_2. = 3 ways

Now these 4 letters can be arrange in 4! = 24 ways

So, the required number is 72 ways (3 × 24)