Combinatories

1:

The number of way a person roundtrip by bus  from A to C by way of B will be

A.

12

B.

48

C.

144

D.

264

 

Answer : C

Explanation :

There are twelve ways to go from A to C by way of B, and 12 ways to return.
Hence there are 12 x 12 = 144 ways to travel round trip.

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Option: A

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