please explain your solution..
thanks
when 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever ?
(1) 880 children developed neither inflammation nor fever
(2) 20 children developed fever.
gmatprep - sets problem
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Would you explain how you got C please?
Is it:
There 120 students w/ fever or inflammation.
20 of those student have the only fever or the fever w/ inflammation.
So, 100 of the students have only inflammation.
Is it:
There 120 students w/ fever or inflammation.
20 of those student have the only fever or the fever w/ inflammation.
So, 100 of the students have only inflammation.
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Answer should be Cshahab03 wrote:please explain your solution..
thanks
when 1,000 children were inoculated with a certain vaccine, some developed inflammation at the site of the inoculation and some developed fever. How many of the children developed inflammation but not fever ?
(1) 880 children developed neither inflammation nor fever
(2) 20 children developed fever.
Inflammation - I
Fever - F
Total = F + I - Both (I+F) + Neither (I+F)
I - Both (I+F) = ???
Statements 1 & 2 are clearly insufficient alone.
Combining 1 & 2
1000 = 20 + I - Both (I+F) + 880
I - Both (I+F) = 100
Sufficient.
Hence C is the answer.
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To parallel_chase
2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...
N the question is asking How many of the children developed inflammation but not fever.
I - Both (I+F) = 100
This does not answer the question
2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...
N the question is asking How many of the children developed inflammation but not fever.
I - Both (I+F) = 100
This does not answer the question
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You are right it is quite possible that few out of 20 even developed inflammation. The question asks How many of the children developed inflammation but not fever ? If 20 of them developed fever,they can be subtractedddm wrote:To parallel_chase
2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...
N the question is asking How many of the children developed inflammation but not fever.
I - Both (I+F) = 100
This does not answer the question
You cannot discover new oceans unless you have the courage to loose sight of the shore.
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NOT FEVER is important. don't confuse it with Inflammation.ddm wrote:To parallel_chase
2nd statement mentions that 20 children developed fever...but it is even possible that few out of 20 even developed inflammation...
N the question is asking How many of the children developed inflammation but not fever.
I - Both (I+F) = 100
This does not answer the question