document.write( "Question 1173852: Betty has 20 different books.
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Algebra.Com's Answer #799146 by ikleyn(52781)\"\" \"About 
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document.write( "    \"C%5B20%5D%5E4\" = \"%2820%2A19%2A18%2A17%29%2F%281%2A2%2A3%2A4%29\" = 4845.    ANSWER\r\n" );
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