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Percents/Algebra Word Translation

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Percents/Algebra Word Translation

by Bens4vcobra » Tue Jul 05, 2011 6:02 am
A collage admissions officer predicts 20% of students who are accepted will not attend 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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by Frankenstein » Tue Jul 05, 2011 6:38 am
Hi,
If n are accepted, 0.8n will attend(enroll)
So, for x to be enrolled, x = 0.8n =>n =1.25x

Hence, D
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by worldpeace93 » Tue Jul 05, 2011 8:30 am
answer is 1/(1-1/5)=1.2
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by Bens4vcobra » Tue Jul 05, 2011 9:17 am
worldpeace93 wrote:answer is 1/(1-1/5)=1.2
This is what I thought as well. But the correct answer is 1.25x.
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by Frankenstein » Tue Jul 05, 2011 9:28 am
Bens4vcobra wrote:
worldpeace93 wrote:answer is 1/(1-1/5)=1.2
This is what I thought as well. But the correct answer is 1.25x.
Hi,
Both of you must have made calculation mistakes.
1/(1-1/5) = 1/(4/5) = 5/4 = 1.25
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by artistocrat » Tue Jul 05, 2011 6:30 pm
This is like a 500-600 level question.
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by Bens4vcobra » Wed Jul 06, 2011 5:50 am
Frankenstein wrote:
Bens4vcobra wrote:
worldpeace93 wrote:answer is 1/(1-1/5)=1.2
This is what I thought as well. But the correct answer is 1.25x.
Hi,
Both of you must have made calculation mistakes.
1/(1-1/5) = 1/(4/5) = 5/4 = 1.25
Could you explain how you came up with "1/(1-1/5)" ? I understand the calculation you performed, however, I'm not understanding where you get your methodology.
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by artistocrat » Wed Jul 06, 2011 9:28 am
Bens4vcobra wrote:A collage admissions officer predicts 20% of students who are accepted will not attend 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
Instead of doing calculations, just pick numbers. Say the target number of students is 100 (x=100), then you would have to accept 125, because 25 or 20% of 125 will not attend.
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