Last visit was: 23 Nov 2024, 11:03 It is currently 23 Nov 2024, 11:03

Close

GRE Prep Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GRE score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel
User avatar
Retired Moderator
Joined: 07 Jun 2014
Posts: 4813
Own Kudos [?]: 11196 [6]
Given Kudos: 0
GRE 1: Q167 V156
WE:Business Development (Energy and Utilities)
Send PM
User avatar
Director
Director
Joined: 22 Jun 2019
Posts: 521
Own Kudos [?]: 711 [3]
Given Kudos: 161
Send PM
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Own Kudos [?]: 12196 [3]
Given Kudos: 136
Send PM
Senior Manager
Senior Manager
Joined: 17 Aug 2019
Posts: 381
Own Kudos [?]: 200 [1]
Given Kudos: 96
Send PM
Re: On Monday, a class has 8 girls and 20 boys. On Tuesday, a ce [#permalink]
1
Hello, I'm confused with the phrase :
a certain number of girls joined the class just as twice that number of boys left the class

I translate it
for girls = 2x
because the girls' number equals twice that of boys. May someone explain pls?
Verbal Expert
Joined: 18 Apr 2015
Posts: 30010
Own Kudos [?]: 36363 [0]
Given Kudos: 25927
Send PM
Re: On Monday, a class has 8 girls and 20 boys. On Tuesday, a ce [#permalink]
1
Expert Reply
Look at the explanation provided by Brent just above. There is nothing to add to that.

it is so simple yet efficient and cristal clear.

Regards
avatar
Intern
Intern
Joined: 30 Jun 2020
Posts: 2
Own Kudos [?]: 0 [0]
Given Kudos: 5
Send PM
Re: On Monday, a class has 8 girls and 20 boys. On Tuesday, a ce [#permalink]
On Monday, a class has 8 girls and 20 boys. On Tuesday, a certain number of girls joined the
class just as twice that number of boys left the class, changing the ratio of girls to boys to 7 to 4.
How many boys left the class on Tuesday?
why we can't reduce the 8 girls and 20 boys in the ratio of 2:5 and solve?
Retired Moderator
Joined: 02 Dec 2020
Posts: 1831
Own Kudos [?]: 2146 [2]
Given Kudos: 140
GRE 1: Q168 V157

GRE 2: Q167 V161
Send PM
On Monday, a class has 8 girls and 20 boys. On Tuesday, a ce [#permalink]
2
Hey,

We are given whole no of boys and girls. So no need to reduce that to a ratio.
And even if you do it,

Let's say girls : boys = 2:5

A certain number of girls joined the class just as twice that number of boys left the class, changing the ratio of girls to boys to 7 to 4
The equation will be like this:

\(\frac{2x + y }{ 5x - 2y}\) = \(\frac{7}{4}\)

Now we will have to deal with \(2\) unknown \(x , y\) with one equation only. So not possible.

Just one thing sir, whatever given in the stem - do not make it more twisted. This one is very easy, just solve and move on.

Ask if something is unclear.

Regards,
R

Uhnil wrote:
On Monday, a class has 8 girls and 20 boys. On Tuesday, a certain number of girls joined the
class just as twice that number of boys left the class, changing the ratio of girls to boys to 7 to 4.
How many boys left the class on Tuesday?
why we can't reduce the 8 girls and 20 boys in the ratio of 2:5 and solve?
Intern
Intern
Joined: 03 Jul 2024
Posts: 3
Own Kudos [?]: 1 [0]
Given Kudos: 0
Send PM
Re: On Monday, a class has 8 girls and 20 boys. On Tuesday, a ce [#permalink]
The phrase of the question could be better than it is.
Prep Club for GRE Bot
Re: On Monday, a class has 8 girls and 20 boys. On Tuesday, a ce [#permalink]
Moderators:
GRE Instructor
84 posts
GRE Forum Moderator
37 posts
Moderator
1111 posts
GRE Instructor
234 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne