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 values of m and n are
A
7,6
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B
6,3
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C
5,1
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D
8,7
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Solution
The correct option is B6,3 ∵ The number of subsets of a set containing p elements = 2p Here, 2m−2n=56 The values of n and n satisfying the given equations form the given option are 6,3. 26−23=64−8=56.