Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

 It is currently 26 May 2017, 18:34

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Blood banks will shortly start to screen all donors for NANB

Author Message
Intern
Joined: 10 Dec 2005
Posts: 18
Followers: 0

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

Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

16 Jan 2006, 16:18
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:02) correct 0% (00:00) wrong based on 8 sessions

### HideShow timer Statistics

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.

The argument above depends on which of the following assumptions?
(A) Donors carrying NANB hepatitis do not, in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
(B) Donors carrying NANB hepatitis do not, in a large percentage of cases, develop the disease themselves at any point.
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors.

I chose C, but the correct answer aparently is A. I am not sure why...

Thanks!
Manager
Joined: 25 May 2011
Posts: 152
Followers: 2

Kudos [?]: 68 [0], given: 71

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

19 Dec 2011, 10:42
I don't understand the question intend..
BSchool Forum Moderator
Status: Flying over the cloud!
Joined: 17 Aug 2011
Posts: 886
Location: Viet Nam
GMAT Date: 06-06-2014
GPA: 3.07
Followers: 74

Kudos [?]: 657 [0], given: 44

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

20 Dec 2011, 05:28
chitownguy 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.

The argument above depends on which of the following assumptions?
(A) Donors carrying NANB hepatitis do not, in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
(B) Donors carrying NANB hepatitis do not, in a large percentage of cases, develop the disease themselves at any point.
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors.

I chose C, but the correct answer aparently is A. I am not sure why...

Thanks!

Choice A states that the test machine use only for checking NANB hepatitis, not other disease. If this test machine use for other disease, then the figure will be wrong.
_________________

Rules for posting in verbal gmat forum, read it before posting anything in verbal forum
Giving me + 1 kudos if my post is valuable with you

The more you like my post, the more you share to other's need

CR: Focus of the Week: Must be True Question

Senior Manager
Joined: 19 Apr 2011
Posts: 279
Schools: Booth,NUS,St.Gallon
Followers: 5

Kudos [?]: 311 [0], given: 51

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

21 Dec 2011, 00:28
I go with option D
_________________

+1 if you like my explanation .Thanks

Senior Manager
Joined: 13 Aug 2010
Posts: 298
Followers: 1

Kudos [?]: 26 [0], given: 1

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

21 Dec 2011, 02:03
-- new screening will catch 5 % of all perspective donors
-- but still miss 2/3 of the contaminated donors

-- so, 10 % of dinners will donate contaminated blood

A) Donors carrying NANB hepatitis do not, in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
the only one that survives.
(B) Donors carrying NANB hepatitis do not, in a large percentage of cases, develop the disease themselves at any point.
-- out of scope
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
-- we know that 5% of total prospective donors = 2/3 of the contaminated population
no relation other than this, wrong
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
-- out of scope.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors.
-- cannot be said.
Director
Joined: 28 Jul 2011
Posts: 549
Location: United States
GPA: 3.86
WE: Accounting (Commercial Banking)
Followers: 3

Kudos [?]: 238 [0], given: 16

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

21 Dec 2011, 04:26
I will go with A, because the % increases as there are no proper tests for other disesses..........But initially i too got this question wrong...but later seeing the OA thought this might be the explanation.............

Hope this is correct
_________________

Manager
Joined: 12 Nov 2011
Posts: 52
GMAT Date: 12-15-2011
Followers: 0

Kudos [?]: 12 [0], given: 1

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

21 Dec 2011, 21:30
IMO A
Manager
Joined: 07 Aug 2011
Posts: 181
Location: United States
GMAT 1: 690 Q48 V37
Followers: 3

Kudos [?]: 23 [0], given: 6

Re: Blood banks will shortly start to screen all donors for NANB [#permalink]

### Show Tags

26 Dec 2011, 09:16
A using POE
as all other fails to point out why still NANB downers will pass the screening
Re: Blood banks will shortly start to screen all donors for NANB   [#permalink] 26 Dec 2011, 09:16
Similar topics Replies Last post
Similar
Topics:
1 Blood banks will shortly start to screen all donors for NANB 7 11 Feb 2009, 05:47
Blood banks will shortly start to screen all donors for NANB 13 07 Apr 2008, 08:06
Blood banks will shortly start to screen all donors for NANB 3 23 Dec 2007, 07:54
Blood banks will shortly start to screen all donors for NANB 8 11 Jul 2007, 11:58
Blood banks will shortly start to screen all donors for NANB 10 11 Jun 2007, 04:45
Display posts from previous: Sort by