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What percent of the girls in the class failed?

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Status: The journey is always more beautiful than the destination
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Concentration: Statistics, Strategy
GMAT 1: 570 Q40 V28
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What percent of the girls in the class failed?  [#permalink]

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New post 07 Apr 2018, 02:19
2
00:00
A
B
C
D
E

Difficulty:

  75% (hard)

Question Stats:

40% (01:35) correct 60% (01:27) wrong based on 35 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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Re: What percent of the girls in the class failed?  [#permalink]

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New post 07 Apr 2018, 02:30
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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Gladi
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Re: What percent of the girls in the class failed? &nbs [#permalink] 07 Apr 2018, 02:30
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