It is currently 25 Nov 2020, 20:12

### GMAT 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

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

Practice
Pays

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

# 75% of all the boys and 48% of all the girls at Smith High S

Author Message
TAGS:
Retired Moderator
Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 175

Kudos [?]: 3035 [0], given: 394

75% of all the boys and 48% of all the girls at Smith High S [#permalink]  14 Jul 2018, 05:07
Expert's post
00:00

Question Stats:

87% (01:07) correct 12% (00:46) wrong based on 16 sessions
75% of all the boys and 48% of all the girls at Smith High School take civics. If there are 20% fewer boys than there are girls in the school, what percent of all the students take civics?

[Reveal] Spoiler: OA
60%

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Retired Moderator
Joined: 07 Jun 2014
Posts: 4803
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 175

Kudos [?]: 3035 [0], given: 394

Re: 75% of all the boys and 48% of all the girls at Smith High S [#permalink]  14 Jul 2018, 05:26
Expert's post
Explanation

Use smart numbers. There are 20% fewer boys than girls, so choose 100 for the number of girls (100 is a good number to pick for percent problems). Thus, there are (100)(0.8) = 80 boys in the school.

If 75% of all the boys take civics, then 0.75(80) = 60 boys take civics. If 48% of all the girls take civics, then 0.48(100) = 48 girls take civics.

Therefore, 60 + 48 = 108 students take civics and there are 180 total students:

$$\frac{108}{180} \times 100\%=60\%$$
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: 75% of all the boys and 48% of all the girls at Smith High S   [#permalink] 14 Jul 2018, 05:26
Display posts from previous: Sort by