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.
\n" ); document.write( "a. What fraction of the electors voted for the third candidate?
\n" ); document.write( "b. If the winner received 3021 votes more than the runner-up, how many electors voted?
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Algebra.Com's Answer #831734 by math_tutor2020(3817)\"\" \"About 
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\n" ); document.write( "Part (a)\r
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\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
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\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
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\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
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\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
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\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
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\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
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\n" ); document.write( "\n" ); document.write( "Part (b)\r
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\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
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\n" ); document.write( "\n" ); document.write( "\"winner received 3021 votes more than the runner-up\" means:
\n" ); document.write( "A = B+3021\r
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\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
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\n" ); document.write( "\n" ); document.write( "-----------------------
\n" ); document.write( "Answers:
\n" ); document.write( "(a) 3/14
\n" ); document.write( "(b) 42294
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