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In how many ways 7 persons can be seated in a row?

Option: 1

720


Option: 2

5040


Option: 3

710


Option: 4

5020

 


Answers (1)

best_answer

Given that,

7 persons may sit in 7 seats.

1st person may sit on any one of the 7 seats 

2nd person may sit on any one of the 6 seats

3rd person may sit on any one of the 5 seats

4th person may sit in any one of the 4 seats and so on.

Therefore, the total number of ways is  \mathrm{ 7\times 6\times 5\times 4\times 3\times 2\times 1=5040\ ways.}

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Sayak

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