document.write( "Question 1116438: In a class there are 45 ways to make pairs of
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Algebra.Com's Answer #731321 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "If \"n\" is the number of students in the class, then the number of possible pairs is .\r\n" );
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document.write( "Your equation is\r\n" );
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document.write( " = 45,   or   n*(n-1) = 90,  which implies  n = 10.\r\n" );
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document.write( "Answer.  There are 10 students in the class.\r\n" );
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