suppose B proper subset of C
a, if n(c)=8 what is the maximum number of elements in B?
b, what is the least number of elements in B?
(a) n(B) < n(C), so 7
(b) n(B) ≥ 0, so 0 (that is, Ø is a proper subset of every set except Ø)
a, if n(c)=8 what is the maximum number of elements in B?
b, what is the least number of elements in B?
(b) n(B) ≥ 0, so 0 (that is, Ø is a proper subset of every set except Ø)