Question

number of non empty subsets of the sets consisting 10 elements in all is...1)1023
2)1024
3)2^2-2
4)2^9

Answer 1

1023 is the correct answer.
solution :-
No. of total subsets of a set =
${2}^{x}$
where x = no. of elements
therefore in this case total subsets =
${2}^{10}$
=1024
without empty set no. of subsets =
1024-1=1023 (ans)