Question 165528
Since "B is a proper subset of C", this means that {{{n(B)<n(C)}}} (ie the number of elements in set B are less than the number of elements in set C)


a)


Since {{{n(B)<n(C)}}} and {{{n(C)=8}}}, this means that {{{n(B)<8}}}. So the max number of elements in set B is 7 (since 7 is the next whole number down from 8)


b)


Since it is possible to have NO elements in set B (ie set B is the null set), this means that the least possible number of elements is zero.