# Elementary Math for Educator

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

If n(c)=5,find n(D)
what other relationship exists between C and D

• Elementary Math for Educator -

If C ⊂ D ∪ D ⊂ C
it implies C = D.
Thus if the cardinality of C is 5, the cardinality of D is also 5.
The other relationship is, as mentioned above, C = D.

• Elementary Math for Educator -

Correction
If C âŠ‚ D D âŠ‚ C
...

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