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April 1, 2015

April 1, 2015

Posted by **kay** on Thursday, May 26, 2011 at 4:17pm.

A = {b,l,a,z,e,r}, B = {b,a,l,e}, C = {a,b,l,e}, D = {l,a,b}, E = {a,b,l}

E C

E B

D B

B C

C A

I chose the last one. Did I choose correctly?

- Geometry -
**MathMate**, Thursday, May 26, 2011 at 10:08pmI cannot interpret the symbol between the sets in the answers.

However, by looking at the answers, I suppose it is the symbol ⊂ which means "is a proper subset of".

If A⊂B, A is a proper subset of B, means that all elements of A are also elements of B,*and*such that A≠B, i.e. the cardinality of A must be*less than*the cardinality of B.

Out of the 5 responses, all the elements of the first set are in the second set. However, there is one case where the two set contain identical elements, i.e. they also have the same number of elements.

Can you find which case?

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