Last visit was: 21 Dec 2024, 17:40 It is currently 21 Dec 2024, 17:40

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
SORT BY:
Date
Verbal Expert
Joined: 18 Apr 2015
Posts: 30448
Own Kudos [?]: 36806 [0]
Given Kudos: 26096
Send PM
avatar
Director
Director
Joined: 03 Sep 2017
Posts: 518
Own Kudos [?]: 707 [0]
Given Kudos: 0
Send PM
avatar
Intern
Intern
Joined: 06 Feb 2019
Posts: 16
Own Kudos [?]: 6 [2]
Given Kudos: 0
Send PM
Verbal Expert
Joined: 18 Apr 2015
Posts: 30448
Own Kudos [?]: 36806 [1]
Given Kudos: 26096
Send PM
Re: In Year x, on which continent did electricity production mos [#permalink]
1
Expert Reply
The solution provided is perfect
Q3: If South America has a population of 368 mln, then the total population is 368/0.079 = 4658.23. Then, the population of Africa is 4658.23*0.106=493.77 that is rounded to 494 mln. Answer A!

SA had 7.9 % of the entire number, which is X

So, 7.9 %

368=0.079 x

x= 368/0.079 = 4658.23

Now, Africa is 4658.23*0.106=493.77

Hope now is more clear.
Manager
Manager
Joined: 03 Aug 2022
Posts: 54
Own Kudos [?]: 32 [0]
Given Kudos: 69
Send PM
Re: In Year x, on which continent did electricity production mos [#permalink]
Carcass wrote:
The solution provided is perfect
Q3: If South America has a population of 368 mln, then the total population is 368/0.079 = 4658.23. Then, the population of Africa is 4658.23*0.106=493.77 that is rounded to 494 mln. Answer A!

SA had 7.9 % of the entire number, which is X

So, 7.9 %

368=0.079 x

x= 368/0.079 = 4658.23

Now, Africa is 4658.23*0.106=493.77

Hope now is more clear.



But this is the type of question ETS would never write. If we use .08 and 0.1 instead of .079 and 0.106, we get very close to option 470. So, the practice material ends up inducing us to eschew estimation altogether... in the test, estimation plays a big role on time management... Anyway...
Moderators:
GRE Instructor
88 posts
GRE Forum Moderator
37 posts
Moderator
1115 posts
GRE Instructor
234 posts

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