Permutations and Combinations Questions

1:

Three persons enter a railway compartment. If there are 5 seats vacant, in how many ways can they take these seats?

A.

60

B.

20

C.

15

D.

125

 

Answer : A

Explanation :

Mahender said: (3:47pm on Tuesday 8th December 2015)
5p3=5!/2!=5*4*3*2!/2!=60

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Option: A

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