document.write( "Question 634835: A girl has 7 coins of different denominations. How many different sums of money can she form using 2 coins at a time? \n" ); document.write( "
Algebra.Com's Answer #399914 by ewatrrr(24785)\"\" \"About 
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\n" ); document.write( "Hi
\n" ); document.write( "A girl has 7 coins of different denominations.
\n" ); document.write( "How many different sums of money can she form using 2 coins at a time?
\n" ); document.write( " 7C2 = \"7%21%2F%282%215%21%29+=+7%2A6%2F2+=+21\" ways \n" ); document.write( "
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