Find all School-related info fast with the new School-Specific MBA Forum

It is currently 03 Aug 2015, 05:10
GMAT Club Tests

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

blood

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
VP
VP
User avatar
Joined: 09 Jul 2007
Posts: 1105
Location: London
Followers: 6

Kudos [?]: 77 [0], given: 0

blood [#permalink] New post 05 Sep 2007, 18:18
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.
19. 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.
Director
Director
User avatar
Joined: 08 Jun 2007
Posts: 584
Followers: 2

Kudos [?]: 80 [0], given: 0

Re: blood [#permalink] New post 05 Sep 2007, 18:28
Brutal...not sure but betting on D
Manager
Manager
avatar
Joined: 20 Jun 2005
Posts: 150
Followers: 1

Kudos [?]: 32 [0], given: 0

Re: blood [#permalink] New post 05 Sep 2007, 18:48
Ravshonbek 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.
19. 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.


straight C by POE.

others are irrelevant.
Manager
Manager
User avatar
Joined: 07 Mar 2007
Posts: 199
Followers: 1

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

 [#permalink] New post 05 Sep 2007, 19:30
This is a good tough CR. In fact, i JUST came across it in CR1000 right before I saw this post. Since, i know the answer already I'm not going to take a crack at it. However, I could use some an explanation for the correct answer. I got this one wrong :(
Director
Director
avatar
Joined: 09 Aug 2006
Posts: 763
Followers: 1

Kudos [?]: 82 [0], given: 0

Re: blood [#permalink] New post 06 Sep 2007, 00:13
Ravshonbek 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.
19. 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.


Surely couldn't take a crack at it within 2 mins. I'll go with E.
C is true but I don't think it's essential for the argument to stand.
D seems to be opposing the argument according to me.
Manager
Manager
avatar
Joined: 09 Jul 2007
Posts: 178
Followers: 1

Kudos [?]: 20 [0], given: 0

 [#permalink] New post 06 Sep 2007, 01:19
i'm also for E

C is irrelevant and D is out of scope
Manager
Manager
avatar
Joined: 20 Jun 2007
Posts: 157
Followers: 1

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

 [#permalink] New post 06 Sep 2007, 05:16
By POE, A. All other options are irrelevant.

A opens up the possibility that some of the remaining 10% of infected blood donors will be screened out by another process, so the real figure will be less than 10%.
VP
VP
avatar
Joined: 10 Jun 2007
Posts: 1463
Followers: 6

Kudos [?]: 146 [0], given: 0

Re: blood [#permalink] New post 06 Sep 2007, 05:49
Ravshonbek 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.
19. 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.


Tough...
I got E by POE.
Re: blood   [#permalink] 06 Sep 2007, 05:49
    Similar topics Author Replies Last post
Similar
Topics:
High blood pressure in Black people Ravshonbek 19 07 Sep 2007, 15:57
Blood banks jeunesis 7 23 May 2006, 10:38
Display posts from previous: Sort by

blood

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.