Q.

 Two finite sets have m and n elements .The number of subsets of the first set is 112  more than that of the second set. The values of m and n are , respectively  

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a

4,7

b

7,4

c

4,4

 

d

7,7

answer is B.

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Detailed Solution

 We know, if any set has m elements, then the number of subsets is 2m.

According to the given condition, we have 

2m -2n = 112=16 × 7 2m -2n = 27 - 24

On comparing both sides, we get  m =7 and n=4

 

 

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