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by Deepthi Subbu » Sat Nov 13, 2010 3:39 am
A college admission officer predicts that 20 % of students who are accepted wil not attend the college . According to his prediction , how many students should be accepted to achieve a planned enrollment of x students?

1. 1.05 x
2. 1.1 x
3.1.2 x
4.1.25 x
5.1.8 x

D
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by GMATGuruNY » Sat Nov 13, 2010 3:46 am
Deepthi Subbu wrote:A college admission officer predicts that 20 % of students who are accepted wil not attend the college . According to his prediction , how many students should be accepted to achieve a planned enrollment of x students?

1. 1.05 x
2. 1.1 x
3.1.2 x
4.1.25 x
5.1.8 x

D
We can plug in values.
Let number of students accepted = 100.
.2*100 = 20 will not attend.
Let x = 80.
Thus, to achieve an enrollment of x=80 students, the number accepted must be 100. This is our target answer.

Now we plug x=80 into all the answers to see which yields our target of 100.
Only D works:
1.25*80 = 100.

The correct answer is D.
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by Deepthi Subbu » Sat Nov 13, 2010 3:59 am
Cool , Thanks for the spontaneous reply.
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