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The number of boys
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15 Jun 2018, 04:40
15 Jun 2018, 04:40
1
Expert Reply
3
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Question Stats:
67% (01:02) correct
32% (00:50) wrong based on 92 sessions
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Attachment:
#GREpracticequestion The number of boys in the class who took the test.jpg [ 52.88 KiB | Viewed 2711 times ]
Quantity A |
Quantity B |
The number of boys in the class who took the test |
The number of girls in the class who took the test |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Re: The number of boys
[#permalink]
Updated on: 17 Jun 2018, 04:38
Updated on: 17 Jun 2018, 04:38
5
Carcass wrote:
Attachment:
test.jpg
Quantity A |
Quantity B |
The number of boys in the class who took the test |
The number of girls in the class who took the test |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Let B for Boys and G for Girls.
Now AM = 90B + 81G = 84(B+G)
We finally get 2B = G i.e. G is twice of B.
G is greater.
B.
General Discussion
Re: The number of boys
[#permalink]
17 Jun 2018, 03:42
17 Jun 2018, 03:42
1
msk0657 wrote:
Carcass wrote:
Attachment:
test.jpg
Quantity A |
Quantity B |
The number of boys in the class who took the test |
The number of girls in the class who took the test |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Let B for Boys and G for Girls.
Now AM = 90B + 81G = 84(B+G)
We finally get 2B = G i.e. G is twice of B.
G is greater.
B.
Re: The number of boys
[#permalink]
13 May 2020, 13:28
13 May 2020, 13:28
3
Expert Reply
There is no need to use algebra here. We just need the weighted average
Girls ----------------------- Average of the class ------------------------ Boys
81 ------------------------------------ 84 ----------------------------------- 90
The distance between 81 and 84 is 3
The distance between 84 and 90 is 6
That means to have the overall average towards (or closer) to the girls they must be more than boys in the classroom. The weight is more.
20-second approach (even less) to solve the question
B is the answer
Girls ----------------------- Average of the class ------------------------ Boys
81 ------------------------------------ 84 ----------------------------------- 90
The distance between 81 and 84 is 3
The distance between 84 and 90 is 6
That means to have the overall average towards (or closer) to the girls they must be more than boys in the classroom. The weight is more.
20-second approach (even less) to solve the question
B is the answer
Re: The number of boys
[#permalink]
12 Dec 2021, 00:24
12 Dec 2021, 00:24
Hello from the GRE Prep Club BumpBot!
Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
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Thanks to another GRE Prep Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
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