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If the ratio of male students to female students in a philosophy class

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If the ratio of male students to female students in a philosophy class  [#permalink]

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New post 07 Nov 2018, 00:54
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

84% (00:28) correct 16% (00:55) wrong based on 31 sessions

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Re: If the ratio of male students to female students in a philosophy class  [#permalink]

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New post 07 Nov 2018, 01:48
If the ratio of male students to female students in a philosophy class is 3:5, and there is a total of 40 students in the class, how many female students are in the class?

A. 8
B. 15
C. 16
D. 24
E. 25

M+f=40
m=40-f
m/f=3/5
40-f/f=3/5
f= 25 option E
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Re: If the ratio of male students to female students in a philosophy class  [#permalink]

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New post 07 Nov 2018, 03:30
Bunuel wrote:
If the ratio of male students to female students in a philosophy class is 3:5, and there is a total of 40 students in the class, how many female students are in the class?

A. 8
B. 15
C. 16
D. 24
E. 25



Total = 40

Common unit be x

3x + 5x = 8x

(40/8x)*5x

= 25.

The best answer is E.
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Re: If the ratio of male students to female students in a philosophy class  [#permalink]

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New post 02 Aug 2019, 02:42
m:f = 3:5 so, f:t = 5:8
now as t is 40, f must be 25.

here m is male, f is female and t is total students.
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Re: If the ratio of male students to female students in a philosophy class  [#permalink]

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New post 04 Aug 2019, 11:36
1
Bunuel wrote:
If the ratio of male students to female students in a philosophy class is 3:5, and there is a total of 40 students in the class, how many female students are in the class?

A. 8
B. 15
C. 16
D. 24
E. 25


We can create the equation:

3x + 5x = 40

8x = 40

x = 5

So, there are 5 * 5 = 25 female students.

Answer: E
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Re: If the ratio of male students to female students in a philosophy class   [#permalink] 04 Aug 2019, 11:36
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