document.write( "Question 1118873: In a certain college, 25% of boys and
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document.write( "10% of the girls are studying mathematics.
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document.write( "The girls constitute 60% of the student
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document.write( "body. If a student is selected at random
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document.write( "and studying mathematics, determine the
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document.write( "probability that the student is a girl. \n" );
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Algebra.Com's Answer #734328 by ikleyn(52810)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( " \r\n" ); document.write( "Let N be the total number of students in the college.\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "Then the number of girls in the college G = 0.6*N (1)\r\n" ); document.write( "\r\n" ); document.write( " the number of boys in the college B = 0.4*N (2)\r\n" ); document.write( "\r\n" ); document.write( " the number of boys studying Math BM = 0.25*B = 0.25*(0.4*N) = 0.1*N (3)\r\n" ); document.write( "\r\n" ); document.write( " the number of girls studying Math GM = 0.1*G = 0.1*(0.6*N) = 0.06*N (4)\r\n" ); document.write( "\r\n" ); document.write( " the number of students studying Math M = BM + GM = 0.1N + 0.06N = 0.16N (5)\r\n" ); document.write( "\r\n" ); document.write( "\r\n" ); document.write( "The problem question is about the ratio\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |