document.write( "Question 165529This question is from textbook
\n" ); document.write( ": Suppose C is a subset of D and D is a subset of C.
\n" ); document.write( "a. If n(C)= 5, find n(D).
\n" ); document.write( "b. What other relationship exists between sets C and D? \n" ); document.write( "

Algebra.Com's Answer #122002 by Edwin McCravy(20056) $\"\"$ $\"About$

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Suppose C is a subset of D and D is a subset of C.
\n" ); document.write( "a. If n(C)= 5, find n(D).
\n" ); document.write( "b. What other relationship exists between sets C and D?
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document.write( "Notice this does not say \"PROPER subset\", but just \"subset\".\r\n" );
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document.write( "The only way two sets can be subsets of each other is for\r\n" );
document.write( "them both to be the same set.  So there really aren't two\r\n" );
document.write( "sets, but just one.\r\n" );
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document.write( "So C and D are the same set, or C=D.\r\n" );
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document.write( "That's the answer to (b), then obviously n(D) = n(C) = 5 \r\n" );
document.write( "is the answer to (a).\r\n" );
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document.write( "Edwin

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