Problem
COM-B1-M01-P004 Nonempty Subsets
#4
★☆☆☆☆ Level 1 of 5
How many nonempty subsets does a set of \(6\) elements have?
First count all subsets.
Each element is either included or not, so there are \(2^6=64\) subsets. One is empty, so \(64-1=63\) are nonempty.
First complement-counting example.