Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 18 Apr 2015, 03:40

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# In a certain class consisting of 36 students, some boys and

Author Message
TAGS:
Senior Manager
Joined: 16 Jul 2005
Posts: 408
Location: Las Vegas
Followers: 1

Kudos [?]: 8 [0], given: 0

In a certain class consisting of 36 students, some boys and [#permalink]  19 Nov 2005, 23:44
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
In a certain class consisting of 36 students, some boys and some girls, exactly 1/3 of the boys and exactly 1/4 of the girls walk to school. What is the greatest possible number of students in this class who walk to school?

a. 9
b. 10
c. 11
d. 12
e. 13

The explanation in the book is not too clear, I would greatly appreciate it if someone can explain how to work this problem out.
VP
Joined: 22 Aug 2005
Posts: 1123
Location: CA
Followers: 1

Kudos [?]: 42 [0], given: 0

C. 11

let x be total number of boys, so 36-x gals.
we need to maximize:

x/3 + (36-x)/4 or x/12 + 9

to maximize, x should be maximum.

x should also be divisible by 12
as question says there are "some" gals, we cannot take x=36

so, x = 24
max students walking = 24/12 + 9 = 11
_________________

Whether you think you can or think you can't. You're right! - Henry Ford (1863 - 1947)

Similar topics Replies Last post
Similar
Topics:
7 A certain class consists of 8 students, including Kim 10 17 Feb 2012, 06:50
12 In a certain class consisting of 36 students, some boys and 5 08 Feb 2011, 03:33
In a certain class consisting of 36 students, some boys and 2 22 Sep 2007, 09:20
1 A certain class consists of fewer than 35 students. If at a 2 15 Jul 2007, 19:26
In a certain class consisting of 36 students some boys and 9 23 Nov 2005, 15:40
Display posts from previous: Sort by