Question 1039048
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The formula for the number of subsets "N" of a finite set consisting of "n" elements is 


N = {{{2^n}}}.


It includes the empty subset and the set itself as a subset.


See the lesson <A HREF=https://www.algebra.com/algebra/homework/word/misc/How-many-subsets-are-there-in-a-given-finite-set-of-n-elements.lesson>How many subsets are there in a given finite set of n elements?</A> in this site.