How many different words can be formed by the letters of the word MISSISSIPPI in which number two S are adjacent ?

1) 8 6C4.7C4

2) 2x7x8C4

3) 6x8x7C4

4) 76C48C4

Answer: 4) 76C48C4

Solution:

Given, the word MISSISSIPPI

There are 4 S’s, 4 I’s, 2 P’s, 1 M

Therefore, the required number of different words = 8C4 x 7!/4!.2!

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