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# In a certain class, 3 out of 24 students are in student organizations.

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In a certain class, 3 out of 24 students are in student organizations.  [#permalink]

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26 Dec 2018, 12:24
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Difficulty:

15% (low)

Question Stats:

85% (00:34) correct 15% (00:55) wrong based on 36 sessions

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In a certain class, 3 out of 24 students are in student organizations. What is the ratio of students in student organizations to students not in student organizations?

A. $$\frac{1}{8}$$

B. $$\frac{1}{7}$$

C. $$\frac{1}{6}$$

D. $$\frac{1}{5}$$

E. $$\frac{1}{4}$$

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 305

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Re: In a certain class, 3 out of 24 students are in student organizations.  [#permalink]

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26 Dec 2018, 13:00
In a certain class, 3 out of 24 students are in student organizations. What is the ratio of students in student organizations to students not in student organizations?

A. $$\frac{1}{8}$$

B. $$\frac{1}{7}$$

C. $$\frac{1}{6}$$

D. $$\frac{1}{5}$$

E. $$\frac{1}{4}$$

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 305

In a certain class, 3 out of 24 students are in student organizations. What is the ratio of students in student organizations to students not in student organizations?
B should be OA
3/21
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Re: In a certain class, 3 out of 24 students are in student organizations.  [#permalink]

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26 Dec 2018, 13:08
In a certain class, 3 out of 24 students are in student organizations. What is the ratio of students in student organizations to students not in student organizations?

A. $$\frac{1}{8}$$

B. $$\frac{1}{7}$$

C. $$\frac{1}{6}$$

D. $$\frac{1}{5}$$

E. $$\frac{1}{4}$$

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 305

let the total students be 24.

students involved in organization = 3

students are not involved in org = 21

Ratio : 3/21 = 1/7

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Re: In a certain class, 3 out of 24 students are in student organizations.  [#permalink]

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26 Dec 2018, 15:55
B.

3/24 - in student organization. Implies that 21/24 are not in a student organization.

Ratio of students in to students not in:

3/21 --> simplified to --> 1/7

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Re: In a certain class, 3 out of 24 students are in student organizations.  [#permalink]

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26 Dec 2018, 18:24
In a certain class, 3 out of 24 students are in student organizations. What is the ratio of students in student organizations to students not in student organizations?

A. $$\frac{1}{8}$$

B. $$\frac{1}{7}$$

C. $$\frac{1}{6}$$

D. $$\frac{1}{5}$$

E. $$\frac{1}{4}$$

Source: Kaplan GMAT Math Workbook - Sixth Edition
Page# 305

No of students in student organization=3
No of students not in student organization=24-3=21
Ratio=3/21=1/7
IMO, Option B
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Re: In a certain class, 3 out of 24 students are in student organizations.   [#permalink] 26 Dec 2018, 18:24
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