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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 26 Jan 2008, 13:06
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: data suffi- [#permalink] New post 26 Jan 2008, 13:35
Dellin wrote:
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


B

We know that
J earns x $/ hour, and the jacket costs 4x
T earns y$/hour, and the jacket costs 5y.

So 4x=5y

1) INSUF. We knew this information from the data before, because y= 4x/5 =0.8x
We can not calculate the cost of the jacket

2) SUF. We have know another equation, so 2 var. with 2 equations.
Re: data suffi-   [#permalink] 26 Jan 2008, 13:35
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If Jim earns x dollars per hour, it will take him 4 hours to

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