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There are 40 girls in a class room. How many of them play both Hockey

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BSchool Forum Moderator
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Joined: 26 Feb 2016
Posts: 1627

Kudos [?]: 696 [0], given: 17

Location: India
Concentration: General Management, Leadership
WE: Sales (Retail)
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There are 40 girls in a class room. How many of them play both Hockey [#permalink]

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New post 10 Oct 2017, 09:53
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

82% (00:29) correct 18% (00:41) wrong based on 34 sessions

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There are 40 girls in a class room. How many of them play both hockey and football?

1. 30 of them play hockey
2. 10 of them play football

Source : Wizako GMAT
[Reveal] Spoiler: OA

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Kudos [?]: 696 [0], given: 17

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Joined: 28 May 2014
Posts: 305

Kudos [?]: 173 [0], given: 81

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Re: There are 40 girls in a class room. How many of them play both Hockey [#permalink]

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New post 11 Oct 2017, 00:07
Total number of girls = 40
1. 30 of them play hockey - No information about girls who play football. Insuff.
2. 10 of them play football - No information about girls who play hockey. Insuff.

Both 1 & 2 together,
Case 1:
It is possible that the 10 girls who play football can also play hockey. In that case the answer will be 10;

Case 2:
It is possible that 30 girls play only hockey ad remaining 10 girls play only football. In that case the answer will be 0;
Hence, Insuff.

Ans: E.

Kudos [?]: 173 [0], given: 81

Re: There are 40 girls in a class room. How many of them play both Hockey   [#permalink] 11 Oct 2017, 00:07
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There are 40 girls in a class room. How many of them play both Hockey

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