Blood banks will shortly start to screen all donors for NANB : GMAT Critical Reasoning (CR)
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# Blood banks will shortly start to screen all donors for NANB

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Senior Manager
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Schools: Kellogg School of Management
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Blood banks will shortly start to screen all donors for NANB [#permalink]

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04 Jun 2006, 07:40
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Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood

Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?
(A) The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.
(B) Donations made by patients specifically for their own use are likely to become less frequent.
(C) The demand for blood from blood banks is likely to fluctuate more strongly.
(D) The blood supplies available from blood banks are likely to go down.
(E) The number of prospective first-time donors is likely to go up by 5 percent
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04 Jun 2006, 10:15
since some of the donors will be rejected total blood supply will go down...

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04 Jun 2006, 10:46
prude_sb wrote:
Blood banks will shortly start to screen all donors for NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore, about 10 percent of actual donors will still supply NANB-contaminated blood

Which of the following inferences about the consequences of instituting the new tests is best supported by the passage above?
(A) The incidence of new cases of NANB hepatitis is likely to go up by 10 percent.
(B) Donations made by patients specifically for their own use are likely to become less frequent.
(C) The demand for blood from blood banks is likely to fluctuate more strongly.
(D) The blood supplies available from blood banks are likely to go down.
(E) The number of prospective first-time donors is likely to go up by 5 percent

Was deciding between C & D.
As C can also imply that the demand for blood fom blood banks may even decrease. Hence D is the answer.
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05 Jun 2006, 03:08
Will go with D.
The number of persons whose blood will be accepted decreases hence the supply decreases.
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05 Jun 2006, 07:51
D it is.
05 Jun 2006, 07:51
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