CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

If a set has 31 proper subsets, then the number of elements in the set is ___.


  1. 4

  2. 5

  3. 6

  4. 7


Solution

The correct option is B

5


If a set has 'n' elements the number of proper subsets is 2n1.

2n1=31

2n=32

2n=25

As bases are equal, exponents may be equated 

n= 5 

Hence (b)

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More...



footer-image