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Two journalists have 8 hours in which to copy edit a total of 100 arti

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Two journalists have 8 hours in which to copy edit a total of 100 arti [#permalink] New post   20 Jan 2023, 06:31
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Two journalists have 8 hours in which to copy edit a total of 100 articles. If Journalist A copy edits at a steady rate of 3.5 articles per hour, how many articles per hour must Journalist B copy edit in order to complete the assignment on time?

(A) 12.5
(B) 9
(C) 8
(D) 4.5
(E) 3
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Re: Two journalists have 8 hours in which to copy edit a total of 100 arti [#permalink] New post   24 Jan 2023, 06:23
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In order to find journalist A's work, you must multiply rate by time: R x t = W= 3.5 articles per hour x 8 hours = 28 articles, journalist B must therefore copy edit 100 - 28 = 72 articles. To find journalist B's rate, simply plug 72 for Work into the work formula and solve
for B's rate: R_B * 8 hours=72 so the rate is 9 articles hours
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Re: Two journalists have 8 hours in which to copy edit a total of 100 arti [#permalink] New post   29 Dec 2023, 17:29
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Or, the sum of their rates is the rate they need to copy edit all the articles. To find the rate they need to copy edit all the articles, do 100/8. So they need to copy edit all the articles at a rate of 12.5 articles per hour. Subtract 3.5 from this to get the rate of the second journalist.
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Re: Two journalists have 8 hours in which to copy edit a total of 100 arti [#permalink]
29 Dec 2023, 17:29
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