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enrollment from 1980 to 2000

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by sanju09 » Wed Mar 04, 2009 5:29 am
The scatterplot attached shows the enrollment in 1980 against the enrollment in 2000 for twenty colleges. Which of the labeled points represents the college that had the smallest percent increase in enrollment from 1980 to 2000?

(A) A
(B) B
(C) C
(D) D
(E) E
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by bluementor » Wed Mar 04, 2009 5:37 am
My guess is E.

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Re: enrollment from 1980 to 2000

by marcusking » Wed Mar 04, 2009 7:41 am
sanju09 wrote:The scatterplot attached shows the enrollment in 1980 against the enrollment in 2000 for twenty colleges. Which of the labeled points represents the college that had the smallest percent increase in enrollment from 1980 to 2000?

(A) A
(B) B
(C) C
(D) D
(E) E
Not sure if this type of question is likely to show up on the GMAT but I'll give it a go.

A) Increase from about 500 to 800 about 3/5 or 60% increase
B) Increase from about 1200 to 2000 about 2/3 or 66% increase
C) Increase from about 3500 to 6500 about 4/5 or 80% increase
D) Increase from about 5500 to 8500 about 2/3 or 65 % increase
E) Increase from about 7500 to 7800 smallest change of 300

300/7500 is going to be the smallest percentage

Must be E.

Please start posting the OA.
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Re: enrollment from 1980 to 2000

by kamu » Wed Mar 04, 2009 9:03 am
sanju09 wrote:The scatterplot attached shows the enrollment in 1980 against the enrollment in 2000 for twenty colleges. Which of the labeled points represents the college that had the smallest percent increase in enrollment from 1980 to 2000?

(A) A
(B) B
(C) C
(D) D
(E) E
Draw a line with slope = 1.

Now check.

Answer is E.
Last edited by kamu on Wed Mar 04, 2009 9:05 am, edited 1 time in total.
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Re: enrollment from 1980 to 2000

by kamu » Wed Mar 04, 2009 9:04 am
sanju09 wrote:The scatterplot attached shows the enrollment in 1980 against the enrollment in 2000 for twenty colleges. Which of the labeled points represents the college that had the smallest percent increase in enrollment from 1980 to 2000?

(A) A
(B) B
(C) C
(D) D
(E) E

E.

A can be eliminated because it deals with smaller number.
hence it makes a bigger difference in terms of percentage.
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by sanju09 » Thu Mar 05, 2009 2:34 am
This is a scatterplot in which each point represents a college. The x-coordinate is the enrollment in 1980, and the y-coordinate is the enrollment in 2000. Point E has approximate coordinates (7,500, 7,700), so the college represented by this point had an enrollment that increased only (7,700 – 7, 500)/7, 500 ≈ 0.027 = 2.7% between 1980 and 2000. All the other labeled points represent colleges with greater percent increases in enrollment.
The mind is everything. What you think you become. -Lord Buddha



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