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# What percent of the girls in the class failed?

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Manager
Status: The journey is always more beautiful than the destination
Affiliations: Computer Science
Joined: 24 Apr 2017
Posts: 50
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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07 Apr 2018, 03:19
2
00:00

Difficulty:

65% (hard)

Question Stats:

48% (01:35) correct 52% (01:28) wrong based on 40 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

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Status: It always seems impossible until it's done.
Joined: 16 Sep 2016
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GMAT 1: 740 Q50 V40
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Re: What percent of the girls in the class failed?  [#permalink]

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07 Apr 2018, 03:30
1
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!
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.

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