Problem
COM-B1-M03-P002 Nonempty Choice
#2
★☆☆☆☆ Level 1 of 5
How many nonempty subsets does a set of \(4\) elements have?
All subsets minus the empty set.
There are \(2^4=16\) subsets. One is empty, so \(15\) are nonempty.
Reinforces complement counting.