document.write( "Question 874753: you have a class of 20 students, a teacher wants to send 4 to get books for her, how many combinations of 4 students can she send? \n" ); document.write( "
Algebra.Com's Answer #527690 by ewatrrr(24785)\"\" \"About 
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20C4 = 4845 combinations = \"20%21%2F%284%2116%21%29+=+%2820%2A19%2A18%2A17%29%2F%284%2A3%2A2%29\" \n" ); document.write( "
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