A set has 31 proper subsets then find the number of elements in the set. And also find the number of subsets having less than or equal to two elements
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Solution:
It is given that ,
Number of proper subsets of set A = 31
=> 2ⁿ = 31+1
=> 2ⁿ = 32
=> n = 5
Therefore,
Number of elements in set A = 5
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