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Question

Number of non empty subsets of the set consisting 10 elements in all, is

A
1023
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B
1024
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C
2102
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D
29
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Solution

The correct option is A 1023
Let A is a set consisting 10 elements
n(A)=10
Now number of subsets of a set having n elements =2n
Number of subsets of given set A=210
Now in these subsets there is only one empty set which is subset of A
Number of non-empty subsets are 2101=1023

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