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A college admissions officer predicts that 20% of the

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sharmin.karim
 Post subject: A college admissions officer predicts that 20% of the
 Post Posted: Sat Oct 24, 2009 5:46 pm 
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Course Students


Posts: 18
A college admissions officer predicts that 20% of the students who are accepted will not attend the college. According to this prediction, how many students should be accepted to achieve a planned enrollment of x students?

A. 1.05x
B. 1.1x
C. 1.2x
D. 1.25x
E. 1.8x
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agha79
 Post subject: Re: A college admissions officer predicts that 20% of the
 Post Posted: Tue Oct 27, 2009 11:50 am 
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Course Students


Posts: 98
CAn you please post OA with your posts.

IMO answer is "D" (1.25x)
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victorgsiu
 Post subject: Re: A college admissions officer predicts that 20% of the
 Post Posted: Wed Oct 28, 2009 9:27 pm 
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Posts: 32
.2A = Will not attend
.8A = Will attend

Question is how many need to be accepted?

.8A = x
A = x/.8
A = 1.25x

Hope that helps.


sharmin.karim wrote:
A college admissions officer predicts that 20% of the students who are accepted will not attend the college. According to this prediction, how many students should be accepted to achieve a planned enrollment of x students?

A. 1.05x
B. 1.1x
C. 1.2x
D. 1.25x
E. 1.8x
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austin.d.anthony
 Post subject: Re: A college admissions officer predicts that 20% of the
 Post Posted: Fri Nov 13, 2009 1:32 pm 
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Students


Posts: 1
what level question is this?
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esledge
 Post subject: Re: A college admissions officer predicts that 20% of the
 Post Posted: Wed Dec 16, 2009 5:16 pm 
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ManhattanGMAT Staff


Posts: 901
Location: St. Louis, MO
austin.d.anthony wrote:
what level question is this?

It's difficult to say--I'd call the math 500-550 level, but it's possible that it ranks as a harder question if many test takers fall for trap answers. (I see 1.2x as a potential trap. If 0.8x had been a choice, it would have offered yet another trap, potentially making the question even harder.)

This question is also a VICs (Variables in answer Choices) question, which tends to be trickier than the equivalent question with only numbers.

So an alternate solution is to use numbers, making the question into an easier one.

If 100 students are accepted, 80 will attend. So let's make the planned enrollment x = 80. Therefore, the college must admit 100 students, so the answer that equals 100 when we plug in 80 for x is correct.

A. 1.05x = (1.05)(80) = 84
B. 1.1x = 88
C. 1.2x = 96
D. 1.25x = 100 ---> CORRECT.
E. 1.8x = 144

_________________
Emily Sledge
Instructor
ManhattanGMAT
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