Permutations and Combinations Questions

1: In a factory for five jobs the members A, B, C, D, E are eligible.
First three jobs can be filled in how many ways?
A.

20

B.

30

C.

60

D.

120

 

Answer : C

Explanation :

First three jobs can be filled by 5 members in 5P3 ways.

Number of ways of filling the first 3 jobs

 5P= 5 x 4 x 3 = 60 ways

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Option: A

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