document.write( "Question 1198174: In an election, there were three candidates. 3/7 of the electors voted for the winner. The runner-up received 5/8 of the remaining votes.
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document.write( "a. What fraction of the electors voted for the third candidate?
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document.write( "b. If the winner received 3021 votes more than the runner-up, how many electors voted? \n" );
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Algebra.Com's Answer #831734 by math_tutor2020(3817)![]() ![]() ![]() You can put this solution on YOUR website! \n" ); document.write( "Part (a)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I'll name the candidates A,B,C \n" ); document.write( "A = winner \n" ); document.write( "B = runner up (aka 2nd place) \n" ); document.write( "C = 3rd place candidate\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The denominators of the fractions are 7 and 8. \n" ); document.write( "The LCD (lowest common denominator) is 7*8 = 56.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Consider the possibility there are 56 electors. \n" ); document.write( "3/7 of 56 = (3/7)*56 = 24 electors voted for person A.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "There are 56-24 = 32 electors who didn't vote for person A. \n" ); document.write( "5/8 of which is (5/8)*32 = 20, and this is the number of people who voted for person B.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Therefore, \n" ); document.write( "56-(24+20) = 56-44 = 12 people voted for person C. \n" ); document.write( "12/56 = (3*4)/(14*4) = 3/14 of the electors voted for person C.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Another way to look at it: \n" ); document.write( "3/7 voted for person A \n" ); document.write( "1-3/7 = 4/7 didn't vote for person A \n" ); document.write( "5/8 of 4/7 = (5/8)*(4/7) = 20/56 = 5/14 voted for person B \n" ); document.write( "Then, \n" ); document.write( "3/7 + 5/14 = 6/14+5/14 = 11/14 voted for either A or B \n" ); document.write( "1 - 11/14 = 3/14 of the electors voted for C\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-----------------------\r \n" ); document.write( "\n" ); document.write( "Part (b)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A = amount winner got \n" ); document.write( "B = amount 2nd place got \n" ); document.write( "C = amount 3rd place got\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "\"winner received 3021 votes more than the runner-up\" means: \n" ); document.write( "A = B+3021\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3/7 voted for A. \n" ); document.write( "4/7 didn't vote for A. \n" ); document.write( "5/8 of 4/7 = 5/14 voted for B (calculated earlier)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "x = total number of electors \n" ); document.write( "A = 3/7 of x = (3/7)x = 3x/7 = 6x/14 \n" ); document.write( "B = 5/14 of x = (5/14)x = 5x/14\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A = B+3021 \n" ); document.write( "6x/14 = 5x/14+3021 \n" ); document.write( "14 * [ 6x/14 ] = 14 * [ 5x/14+3021 ] \n" ); document.write( "6x = 5x + 42294 \n" ); document.write( "6x-5x = 42294 \n" ); document.write( "x = 42294\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "----------------------- \n" ); document.write( "Answers: \n" ); document.write( "(a) 3/14 \n" ); document.write( "(b) 42294 \n" ); document.write( " \n" ); document.write( " |