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## Fractions, ratio and decimals

tagged by: Brent@GMATPrepNow

This topic has 2 expert replies and 0 member replies

### Top Member

BTGmoderatorRO Moderator
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#### Fractions, ratio and decimals

Mon Sep 18, 2017 1:36 pm
In Mr. Smith's class, what is the ratio of the number of boys to the number of girls?
(1) There are 3 times as many girls as boys in Mr. Smith's class.
(2) The number of boys is 1/4 of the total number of boys and girls in Mr. Smith's class.

a. None of the statement is sufficient
b. only statement 1 is sufficient
c. statement 1 and 2 are sufficient
d. statement 2 is not sufficient
e. statement 2 is sufficient and statement 1 is insufficient

QA is c.

why is statement 2 wrong?

### GMAT/MBA Expert

Brent@GMATPrepNow GMAT Instructor
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Mon Sep 18, 2017 1:41 pm
Roland2rule wrote:
In Mr. Smith's class, what is the ratio of the number of boys to the number of girls?

(1) There are 3 times as many girls as boys in Mr. Smith's class.
(2) The number of boys is 1/4 of the total number of boys and girls in Mr. Smith's class.
Target question: What is the ratio of the number of boys to the number of girls?

Statement 1: There are 3 times as many girls as boys in Mr. Smith's class.
This means there are 3 girls for every 1 boy
So, the ratio of the number of boys to the number of girls = 3 : 1
Since we can answer the target question with certainty, statement 1 is SUFFICIENT

Statement 2: The number of boys is 1/4 of the total number of boys and girls in Mr. Smith's class.
So, for every 4 children there are 3 girls and 1 boy
So, the ratio of the number of boys to the number of girls = 3 : 1
Since we can answer the target question with certainty, statement 2 is SUFFICIENT

Cheers,
Brent

_________________
Brent Hanneson â€“ Founder of GMATPrepNow.com
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### GMAT/MBA Expert

Brent@GMATPrepNow GMAT Instructor
Joined
08 Dec 2008
Posted:
11521 messages
Followed by:
1229 members
5254
GMAT Score:
770
Mon Sep 18, 2017 1:42 pm
Roland2rule wrote:
In Mr. Smith's class, what is the ratio of the number of boys to the number of girls?
(1) There are 3 times as many girls as boys in Mr. Smith's class.
(2) The number of boys is 1/4 of the total number of boys and girls in Mr. Smith's class.

a. None of the statement is sufficient
b. only statement 1 is sufficient
c. statement 1 and 2 are sufficient
d. statement 2 is not sufficient
e. statement 2 is sufficient and statement 1 is insufficient

QA is c.

why is statement 2 wrong?
Hey Roland2rule,

You have posted incorrect answers to several questions.

Cheers,
Brent

_________________
Brent Hanneson â€“ Founder of GMATPrepNow.com
Use our video course along with

Check out the online reviews of our course
Come see all of our free resources

GMAT Prep Now's comprehensive video course can be used in conjunction with Beat The GMATâ€™s FREE 60-Day Study Guide and reach your target score in 2 months!

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