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# When 1000 children were inoculated witha certain

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Manager
Joined: 28 Mar 2006
Posts: 158
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When 1000 children were inoculated witha certain [#permalink]

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31 May 2006, 01:48
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100% (00:00) correct 0% (00:00) wrong based on 5 sessions

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When 1000 children were inoculated witha certain vaccine,some developed inflamtion at the site of the inoculation and some developed fever.how many of the children developed inoculation but not fever.?

1)880 children developed neither inflamationnor fever
2)20 children developed fever

The question never says whether some developed both or not. What shall we assume in such a situation. I thought the information whether any child acquired both probelms is missing and marked E...
Manager
Joined: 09 May 2006
Posts: 99
Location: Bangalore, India
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31 May 2006, 02:01
itishaj wrote:
When 1000 children were inoculated witha certain vaccine,some developed inflamtion at the site of the inoculation and some developed fever.how many of the children developed inoculation but not fever.?

1)880 children developed neither inflamationnor fever
2)20 children developed fever

The question never says whether some developed both or not. What shall we assume in such a situation. I thought the information whether any child acquired both probelms is missing and marked E...

Will go with E. The last line indicates that there is an overlap between two categories.
VP
Joined: 29 Dec 2005
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31 May 2006, 08:34
itishaj wrote:
When 1000 children were inoculated witha certain vaccine,some developed inflamtion at the site of the inoculation and some developed fever.how many of the children developed inoculation but not fever.?

1)880 children developed neither inflamation nor fever
2)20 children developed fever

i guess there is a typo: innoculation should be inflamation. ok, now

from i and ii, fever = 20
nither = 880
so fever + inflamation = 120
so only inflamation = 100

its C.
Manager
Joined: 28 Mar 2006
Posts: 158
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31 May 2006, 08:58
yea right prof...that was a type and the answer is C indeed..
Can you plz suggest me some gud source to practice DS questions as most of mistakes are in DS ques only. My GMAT date is very near..7th june...
31 May 2006, 08:58
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