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  • Three students enter a classroom in which there are 9 seats. In how many ways they can take their seats?Option: 1 505<div cla

Three students enter a classroom in which there are 9 seats. In how many ways they can take their seats?

Option: 1

505


Option: 2

501


Option: 3

510


Option: 4

504


Answers (1)

best_answer

1st student may choose 1 seat out of 9 seats

2nd student may choose 1 seat out of 8 seats

3rd student may choose 1 seat out of 7 seats

Therefore, the total number of ways of selecting a seat is \mathrm{9\times 8\times 7=504\ ways.} 

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