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?
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Fractions, ratio and decimals
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Target question: What is the ratio of the number of boys to the number of girls?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.
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
Answer: D
Cheers,
Brent
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Brent@GMATPrepNow
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Hey Roland2rule,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?
You have posted incorrect answers to several questions.
Please look at the answer key before posting more incorrect answers.
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
