How do I determine the subset relationships in this math problem?

Suppose C is a subset of D and D is a subset of C.





A) If n(C) = 5, find n(D)





B) What other relationship exists between sets C and D?





How do I figure this out?How do I determine the subset relationships in this math problem?
I don't know the exact wording in your class, but





';C is a subset of D'; means that all members of the set C are members of the set D (there may be other members of D).


and


';D is a subset of C'; means that all members of the set D are members of the set C (there may be other members of C).





So, since ';C is a subset of D'; AND ';D is a subset of C';,


is either C or D bigger than the other? Why?

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