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STATISICS-A test is scored out of 100

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Intern
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Joined: 08 Sep 2014
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STATISICS-A test is scored out of 100 [#permalink] New post 08 Sep 2014, 19:44
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Question Stats:

40% (00:18) correct 60% (00:24) wrong based on 10 sessions
A test is scored out of 100 and the scores are divided into five quintile groups. Students are not told their scores,
but only their quintile group.

Quanti ty A

The scores of two students in the bottom quintile
group, chosen at random and added together


Quanti ty B
The score of a student in the top
quintile group, chosen at random
[Reveal] Spoiler: OA
Manager
Manager
Joined: 27 Sep 2017
Posts: 112
Followers: 1

Kudos [?]: 29 [0], given: 4

Re: STATISICS-A test is scored out of 100 [#permalink] New post 07 Mar 2018, 00:26
anik1989 wrote:
A test is scored out of 100 and the scores are divided into five quintile groups. Students are not told their scores,
but only their quintile group.

Quanti ty A

The scores of two students in the bottom quintile
group, chosen at random and added together


Quanti ty B
The score of a student in the top
quintile group, chosen at random


In this problem, we are NOT specifically told the scores of each quintile groups.

Then we can think that for A the 2 students' grades woould be 50 and 51 whose total would be 101

or the 2 students' grades woould be 30 and 31 whose total would be 61.

Then we can assume that the scores of student in the top
quintile group is 100 or 80.

In this way, we cann know that the answer is D.
Re: STATISICS-A test is scored out of 100   [#permalink] 07 Mar 2018, 00:26
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STATISICS-A test is scored out of 100

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