GMAT Test Takers

[abhisays]

10% of GMAT test takers take the exam more than once and have a high score of 700 or greater, and 20% of GMAT test takers who take the test only once have a score of 700 or greater. If 40% of GMAT test takers take the exam more than once, what percent of GMAT test takers have a high score less than 700?

A. 10.5%
B. 22%
C. 30%
D. 70%
E. 78 %

[Frankenstein]

Hi,
what percent of GMAT test takers have a high score more than 700? I guess it is 700 or more than 700 right?
Let the number of test takers be 100.

--------Once-----More than once
>=700---x--------10
<700---4x--------y
------------------------
-------5x--------(100-5x)
Given that 100-5x = 40 =>x=12.
We need to find, x+10 = 22

Hence, B

[fr743]

Hi,
what percent of GMAT test takers have a high score more than 700? I guess it is 700 or more than 700 right?
Let the number of test takers be 100.

--------Once-----More than once
>=700---x--------10
<700---4x--------y
------------------------
-------5x--------(100-5x)
Given that 100-5x = 40 =>x=12.
We need to find, x+10 = 22

Hence, B

Could you elaborate your explanation. And say precisely which (x, 10, 4x) stands for which?

[Frankenstein]

Hi,
Let '5x' be the number of GMAT test takers who take the test only once.
20% of GMAT test takers who take the test only once have a score of 700 or greater. So, that will be 20%(5x) = x.
Remaining 4x will be the ones who have taken the test once but scored less than 700.

10% of GMAT test takers take the exam more than once and have a high score of 700 or greater.
As I have considered the total number of test takers to be 100, Number of takers more than once and score >=700 will be 10%(100) = 10.

[GMATGuruNY]

10% of GMAT test takers take the exam more than once and have a high score of 700 or greater, and 20% of GMAT test takers who take the test only once have a score of 700 or greater. If 40% of GMAT test takers take the exam more than once, what percent of GMAT test takers have a high score less than 700?

A. 10.5%
B. 22%
C. 30%
D. 70%
E. 78 %

Use a group grid to organize the information.
Let total = 100.

In the grids below:
-- All the numbers in the grid have to add up horizontally and vertically.
-- Values given by the problem are entered in blue.
-- Values calculated based upon information given by the problem are entered in red.

40% take the exam more than once.
10% take the exam more than once and have a score of 700 or greater.


20% of GMAT test takers who take the test only once have a score of 700 or greater.


Total with a score less than 700 = 78%.

The correct answer is E.

[fr743]

Thanx Mitch, everytime you help!

[jaymw]

10% of GMAT test takers take the exam more than once and have a high score of 700 or greater, and 20% of GMAT test takers who take the test only once have a score of 700 or greater. If 40% of GMAT test takers take the exam more than once, what percent of GMAT test takers have a high score more than 700?

A. 10.5%
B. 22%
C. 30%
D. 70%
E. 78 %

Use a group grid to organize the information.
Let total = 100.

In the grids below:
-- All the numbers in the grid have to add up horizontally and vertically.
-- Values given by the problem are entered in blue.
-- Values calculated based upon information given by the problem are entered in red.

40% take the exam more than once.
10% take the exam more than once and have a score of 700 or greater.


20% of GMAT test takers who take the test only once have a score of 700 or greater.


Total with a score of 700 or greater = 22%.

The correct answer is B.

Excellent way! I don't know if I am the only one noticing that the question needs rewording. In the first 2 sentences of the prompt, a score of 700 or greater is mentioned, but then the actual question is about a score of more than 700. If the wording of the question is correct, there is no way to find the answer based on the information given!

[abhisays]

Sorry for the confusion, I have corrected the question.

10% of GMAT test takers take the exam more than once and have a high score of 700 or greater, and 20% of GMAT test takers who take the test only once have a score of 700 or greater. If 40% of GMAT test takers take the exam more than once, what percent of GMAT test takers have a high score less than 700?

A. 10.5%
B. 22%
C. 30%
D. 70%
E. 78 %

[Frankenstein]

Excellent way! I don't know if I am the only one noticing that the question needs rewording. In the first 2 sentences of the prompt, a score of 700 or greater is mentioned, but then the actual question is about a score of more than 700. If the wording of the question is correct, there is no way to find the answer based on the information given!

Hey,
You are not alone. I pointed that in my post as well.

Sorry for the confusion, I have corrected the question.

10% of GMAT test takers take the exam more than once and have a high score of 700 or greater, and 20% of GMAT test takers who take the test only once have a score of 700 or greater. If 40% of GMAT test takers take the exam more than once, what percent of GMAT test takers have a high score less than 700?

A. 10.5%
B. 22%
C. 30%
D. 70%
E. 78 %

Anyway, now that should modified your question, the answer would be 100-22 = 78.
Hence, E

[jaymw]

Sorry, missed that in your post, Frankenstein.

Anyway, now the question makes perfect sense.

[Frankenstein]

Sorry, missed that in your post, Frankenstein.

Anyway, now the question makes perfect sense.

Hey,
No probs, mate. Yeah, it does make sense now