Chapter 3 - Solving Inequalities - 3-5 Working With Sets - Practice and Problem-Solving Exercises - Page 197: 19

{ }, {a}, {e}, {i}, {o}, {a,e}, {a,i}, {a,o}, {e,i}, {e,o}, {i,o}, {a,e,i}, {a,e,o}, {a,i,o}, {e,i,o}, {a,e,i,o}

The empty set is a subset of all sets { } List all the subsets with 1 member {a}, {e}, {i}, {o} List all the subsets with 2 members {a,e}, {a,i}, {a,o}, {e,i}, {e,o}, {i,o} List all the subsets with 3 members {a,e,i}, {a,e,o}, {a,i,o}, {e,i,o} List all the subsets with 4 members {a,e,i,o}