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What percent of the girls in the class failed?

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Intern
Intern
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S
Status: The journey is always more beautiful than the destination
Affiliations: Computer Science
Joined: 24 Apr 2017
Posts: 41
Location: India
Concentration: Statistics, Strategy
GMAT 1: 570 Q40 V28
GPA: 3.14
What percent of the girls in the class failed? [#permalink]

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New post 07 Apr 2018, 03:19
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A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

47% (00:36) correct 53% (00:31) wrong based on 15 sessions

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What percent of the girls in the class failed?

(1) 66.66% of the boys in the class passed and 33.33% of the students in the class failed.
(2) There are 30 boys and 24 girls in the class.


Source: Time4education
[Reveal] Spoiler: OA

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Joined: 16 Sep 2016
Posts: 206
WE: Analyst (Health Care)
Re: What percent of the girls in the class failed? [#permalink]

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New post 07 Apr 2018, 03:30
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Nixondutta wrote:
What percent of the girls in the class failed?

(1) 66.66% of the boys in the class passed and 33.33% of the students in the class failed.
(2) There are 30 boys and 24 girls in the class.


Source: Time4education


Good question.

1) 2/3 rd of the boys passed => 1/3rd of boys failed. let m be the fraction of girls failed... since 1/3rd of whole class has failed. M = 1/3rd. Sufficient!
[Reveal] Spoiler: Further explanation
... x be # of boys & y be # of girls & C be # of students.
x + y = C

... x/3 + m*y = C/3 total # of students failed

we can find m.


2) No info about failure given. Not suff

Hence Option (A) is correct.

Best,
Gladi
Re: What percent of the girls in the class failed?   [#permalink] 07 Apr 2018, 03:30
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What percent of the girls in the class failed?

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