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Is the tallest child in class A taller than the tallest child in class

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Senior Manager
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Joined: 19 Oct 2012
Posts: 335

Kudos [?]: 60 [0], given: 103

Location: India
Concentration: General Management, Operations
GMAT 1: 660 Q47 V35
GMAT 2: 710 Q50 V38
GPA: 3.81
WE: Information Technology (Computer Software)
Is the tallest child in class A taller than the tallest child in class [#permalink]

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New post 17 Oct 2017, 05:26
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Question Stats:

66% (00:52) correct 34% (00:54) wrong based on 92 sessions

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Is the tallest child in Class A taller than tallest child in Class B?

1) The range of the heights of the children in Class A is greater than the range of the heights of the children in class B.
2) The shortest child in Class A is shorter than the shortest child in Class B.
[Reveal] Spoiler: OA

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Kudos [?]: 60 [0], given: 103

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Joined: 18 Aug 2015
Posts: 17

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Is the tallest child in class A taller than the tallest child in class [#permalink]

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New post 17 Oct 2017, 06:47
1) The range of the heights of the children in Class A is greater than the range of the heights of the children in class B.
- The range is greater, but may not end with the tallest child

2) The shortest child in Class A is shorter than the shortest child in Class B.
- Does not address the questions

Combined - We do not have a starting point for the range.

E

Kudos [?]: 1 [0], given: 8

1 KUDOS received
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Joined: 21 Aug 2013
Posts: 568

Kudos [?]: 184 [1], given: 289

Location: India
Re: Is the tallest child in class A taller than the tallest child in class [#permalink]

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New post 25 Nov 2017, 23:47
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Lets say shortest child in class A has height a1, and tallest child in class A has height a2.
Lets say shortest child in class B has height b1, and tallest child in class A has height b2.
We need to know whether a2 > b2 or not? (or whether a2-b2 > 0 or not)

(1) Range of height of children in class A > range of height of children in class B
OR a2 - a1 > b2 - b1 Or a2-b2 > a1-b1
Here we dont know whether a1-b1 is > 0 or not, So cannot answer. Insufficient

(2) Given a1 < b1. This doesnt tell us whether a2 > b2 or not, just tells us that a1-b1 < 0 or negative. Insufficient.

Combining the two statements, a2-b2 > a1-b1 or a2-b2 is greater than a negative quantity. But still we cant say whether a2-b2 is greater than 0 or not, or whether a2>b2 or not? Still insufficient.

Hence E answer

Kudos [?]: 184 [1], given: 289

Re: Is the tallest child in class A taller than the tallest child in class   [#permalink] 25 Nov 2017, 23:47
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Is the tallest child in class A taller than the tallest child in class

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