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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
GRE Math Challenge #6 - A jar contains 10 red marbles and 30
[#permalink]
06 Sep 2014, 13:00
06 Sep 2014, 13:00
Expert Reply
00:00
Question Stats:
80% (01:27) correct
20% (02:26) wrong based on 45 sessions
Hide Show timer Statistics
A jar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?
Show: :: Answer
Answer: 35
Re: GRE Math Challenge #6
[#permalink]
08 Sep 2014, 23:04
08 Sep 2014, 23:04
10 red marbles out of 40 marbles implies the percentage of red marbles is 10/40 = 1/4 = 25%
If we have to make the percentage share as 60% , then additional red marbles reqd. would be = 60 - 25 = 35 red marbles.
To cross check, after addition the no. of red marbles = 10+35 = 45, no. of green marbles = 30, hence total no. of marbles in the jar = 45+30 = 75. The percentage of red marbles = 45/75 = 0.6 = 60%
If we have to make the percentage share as 60% , then additional red marbles reqd. would be = 60 - 25 = 35 red marbles.
To cross check, after addition the no. of red marbles = 10+35 = 45, no. of green marbles = 30, hence total no. of marbles in the jar = 45+30 = 75. The percentage of red marbles = 45/75 = 0.6 = 60%
A jar contains 10 red marbles and 30 green ones. How many re
[#permalink]
31 Jan 2019, 15:58
31 Jan 2019, 15:58
Expert Reply
A jar contains 10 red marbles and 30 green ones. How many red marbles must be added to the jar so that 60% of the marbles will be red?
Show: :: OA
35
