document.write( "Question 1117924: The ratio of freshmen to sophomores to juniors to seniors of a certain high school is 5:5:4:2. Which of the following CANNOT be the total number of the students?\r
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document.write( "A. 560
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document.write( "B. 680
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document.write( "C. 1,024
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document.write( "D. 1,600 \n" );
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Algebra.Com's Answer #733098 by ikleyn(52790)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( " \r\n" ); document.write( "The numbers under possible options must be multiple of the number of 5+5+4+2= 16.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "It is the necessary and sufficient condition for each option to be true.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "The value 680 under the option B is not multiple of 16, so this option CANNOT be the total number of the students.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "The other three options are possible.\r\n" ); document.write( "\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |