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Two finite sets have m and n elements. T...

Two finite sets have m and n elements. The total number of subsets of the first set is 56 more than the total number of subsets of the second set. The value of m and n is

A

`(7,6)`

B

`(6,3)`

C

`(5,1)`

D

(8,7)`

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The correct Answer is:
B
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