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# The R students in a class agree to contribute equally to buy

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Manager
Joined: 04 Apr 2008
Posts: 215

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Location: Pune
The R students in a class agree to contribute equally to buy [#permalink]

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08 Jul 2008, 05:15
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100% (01:28) correct 0% (00:00) wrong based on 9 sessions

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The R students in a class agree to contribute equally to buy their teacher a birthday present that costs y dollars. If x of the students later fail to contribute their share, which of the following represents the additional number of dollars that each of the remaining students must contribute in order to pay for the present?
(A) Y/R
(B) Y/(R-X)
(C) XY/(R-X)
(D) XY/R(R-X)
(E) Y/R(R-X)
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Kudos [?]: 39 [0], given: 3

Manager
Joined: 08 Jun 2008
Posts: 70

Kudos [?]: 9 [0], given: 0

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08 Jul 2008, 05:25
If everybody pays, it is Y/R dollars per student.
If X sutdents are not paying the total additional amount will be XY/R dollars
It should be shared by R-X students, which means the additional amount for each student is XY/R(R-X) = D

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Manager
Joined: 24 Apr 2008
Posts: 161

Kudos [?]: 49 [2], given: 0

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08 Jul 2008, 05:27
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Total cost = Y

Cost per student: Y/R

Now tot no. of students who contribute = R-X

Hence each student has to contribute: Y/ (R-X)

Additional amt: Y/R - Y/(R-X) = YX/R(R-X)

Hence D

Kudos [?]: 49 [2], given: 0

Non-Human User
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Re: The R students in a class agree to contribute equally to buy [#permalink]

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19 Jun 2017, 10:55
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Kudos [?]: 288 [0], given: 0

Re: The R students in a class agree to contribute equally to buy   [#permalink] 19 Jun 2017, 10:55
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