Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 24 May 2017, 01:43

### 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

# At a certain school, the ratio of the number of second

Author Message
Senior Manager
Joined: 08 Jun 2004
Posts: 495
Location: Europe
Followers: 1

Kudos [?]: 75 [0], given: 0

At a certain school, the ratio of the number of second [#permalink]

### Show Tags

24 Apr 2006, 02:21
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

At a certain school, the ratio of the number of second graders to the number of fourth graders is 8 to 5, and the ratio of the number of first graders to the number of second graders is 3 to 4. If the ratio of the number of third graders to the number of fourth graders is 3 to 2, what is the ratio of the number of first graders to the number of third graders?

A. 16 to 15
B. 9 to 5
C. 5 to 16
D. 5 to 4
E. 4 to 5
VP
Joined: 29 Apr 2003
Posts: 1403
Followers: 2

Kudos [?]: 29 [0], given: 0

### Show Tags

24 Apr 2006, 02:36
4/5

Ans is E...

Normalize all the numerators demonimators! (Use Lowest Common Denomintor).

You should get the value!
Intern
Joined: 28 Nov 2005
Posts: 33
Followers: 0

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

### Show Tags

24 Apr 2006, 05:17

We have:
B:D
8:5

A:B
3:4

C:D
3:2

We are looking for: A:C ?
1Â°)
A:D
6:5

2Â°)
A:C
12:15 = 4:5

Senior Manager
Joined: 08 Jun 2004
Posts: 495
Location: Europe
Followers: 1

Kudos [?]: 75 [0], given: 0

### Show Tags

24 Apr 2006, 05:45
Anybody else?
Manager
Joined: 13 Dec 2005
Posts: 224
Location: Milwaukee,WI
Followers: 1

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

### Show Tags

24 Apr 2006, 12:24
g1/g3 = (g1/g2) * (g2/g4) * (g4/g3)

= (3/4) *(8/5) * (2/3)

=4/5

so the ratio is 4:5

g1 g2 g3 g4 are the grades
Intern
Joined: 28 Nov 2005
Posts: 33
Followers: 0

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

### Show Tags

24 Apr 2006, 16:43
Thanks IPC302, your technique is much faster than mine!
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5045
Location: Singapore
Followers: 31

Kudos [?]: 376 [0], given: 0

### Show Tags

24 Apr 2006, 18:54
2nd:4th = 8:5
1st:2nd = 3:4
3rd:4th = 3:2

1st:3rd = ??

We can work out:

1st:2nd:3rd:4th
12:16:15:10

So 1st/3rd = 12/15 = 4/5
Senior Manager
Joined: 08 Jun 2004
Posts: 495
Location: Europe
Followers: 1

Kudos [?]: 75 [0], given: 0

### Show Tags

25 Apr 2006, 11:22
OA is 'E'
Great explanation guys.
25 Apr 2006, 11:22
Display posts from previous: Sort by