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If Jim earns x dollars per hour, it will take him 4 hours to

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If Jim earns x dollars per hour, it will take him 4 hours to [#permalink] New post 19 Jul 2008, 05:43
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If Jim earns x dollars per hour, it will take him 4 hours to earn exactly enough money to purchase a particular jacket. If Tom earns y dollars per hour, it will take him exactly 5 hours to earn enough money to purchase the same jacket. How much does the jacket cost?

(1) Tom makes 20% less per hour than Jim does.

(2) x + y = $43.75
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Re: DS : Jacket [#permalink] New post 19 Jul 2008, 06:02
Jim earns 4x
Tom earns 5y,
both of these values buy same jacket, accordingly, 4x=5y
we can say that x=5k, y=4k => this means that Tom earns 20% less than Jim.

1) this is not sufficient because this is clear in the question.
2) x + y = $43.75 , 5k+4k=9k , 9k= $43,75, we can find the value of k.
Price of a jacket is 4x or 5y than 4x=20k, this is sufficient to solve the problem.

The answer is B
Re: DS : Jacket   [#permalink] 19 Jul 2008, 06:02
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If Jim earns x dollars per hour, it will take him 4 hours to

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