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

It is currently 25 Oct 2014, 06:56

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 banks will shortly start to screen all donors for NANB

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
avatar
Joined: 19 Feb 2007
Posts: 328
Followers: 1

Kudos [?]: 8 [0], given: 0

Blood banks will shortly start to screen all donors for NANB [#permalink] New post 10 Jul 2007, 10:10
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
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.

20. 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.
Senior Manager
Senior Manager
avatar
Joined: 06 Mar 2006
Posts: 497
Followers: 7

Kudos [?]: 80 [0], given: 1

CR - NANB [#permalink] New post 10 Jul 2007, 12:42
Well, for number 19, answer A and B are out of scope. I cannot decide among C, D, or E. But I think I will go with C.

For number 20, I will go with D.
Senior Manager
Senior Manager
avatar
Joined: 06 Jul 2004
Posts: 474
Location: united states
Followers: 1

Kudos [?]: 11 [0], given: 0

Re: CR - NANB [#permalink] New post 10 Jul 2007, 13:27
sidbidus 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.

20. 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.


A for 19 and D for 20.

the argument says that

about 10 percent of actual donors will still supply NANB-contaminated blood.. This means that it assumes that these 10% people will not be rendered unfit because of some other reason.
So, A should be the answer to Q-19.

D sounds like the only right choice for 20.
_________________

for every person who doesn't try because he is
afraid of loosing , there is another person who
keeps making mistakes and succeeds..

Director
Director
avatar
Joined: 17 Sep 2005
Posts: 931
Followers: 2

Kudos [?]: 29 [0], given: 0

Re: CR - NANB [#permalink] New post 10 Jul 2007, 18:56
shoonya wrote:
[A for 19 and D for 20.

the argument says that

about 10 percent of actual donors will still supply NANB-contaminated blood.. This means that it assumes that these 10% people will not be rendered unfit because of some other reason.
So, A should be the answer to Q-19.

D sounds like the only right choice for 20.


Correct.

- Brajesh
Director
Director
User avatar
Joined: 14 Jan 2007
Posts: 782
Followers: 2

Kudos [?]: 56 [0], given: 0

 [#permalink] New post 11 Jul 2007, 02:00
Mine is 'A' and 'D'

Post the OA please.
Senior Manager
Senior Manager
avatar
Joined: 19 Feb 2007
Posts: 328
Followers: 1

Kudos [?]: 8 [0], given: 0

 [#permalink] New post 11 Jul 2007, 10:07
OA is A and D.

Can somebody explain why is the OA (A) for the first one?
SVP
SVP
User avatar
Joined: 08 Nov 2006
Posts: 1560
Location: Ann Arbor
Schools: Ross '10
Followers: 12

Kudos [?]: 165 [0], given: 1

 [#permalink] New post 11 Jul 2007, 10:23
sidbidus wrote:
OA is A and D.

Can somebody explain why is the OA (A) for the first one?


Use numbers to attack this CR. Lets say there are 100 total donors. Lets say the screening eliminates 5 donors(equal to 5% rate quoted in the argument). Therefore, there are 95 donors left. The passage says that the initial screening only eliminates 1/3rd of NANB patients. If that is true then,

1/3 of NANB patients = 5 donors

Implying,

Total number of NANB patients = 3*5=15

Out of this 15-5=10 patients were undetected by the screening. But does that mean they will definitely donate blood. For them to donate blood, they need to pass through all the other screening tests or in other words, their infection should not be detected through other routinely conducted tests.

Paraphrase this reasoning and you get (A) Donors carrying NANB hepatitis do not, in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.

Is this helpful?
Director
Director
User avatar
Joined: 14 Jan 2007
Posts: 782
Followers: 2

Kudos [?]: 56 [0], given: 0

 [#permalink] New post 11 Jul 2007, 10:36
sidbidus wrote:
OA is A and D.

Can somebody explain why is the OA (A) for the first one?


Let me give a try to explain.

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.


This is more of a quants rather than a verbal problem.
let's assume the total number of donors are 100.
the test disqualifies 5, which is the 1/3 of the NANB donors. So number of NANB donors are = 15. This means 10 NANB donors are NOT caught up in the test.
The last sentence says - 'about 10 percent of actual donors will still supply NANB-contaminated blood'.

This will be possible if 10 NANB donors, who were not caught in test, are not caught in some other tests required to be done for other infections.
Senior Manager
Senior Manager
avatar
Joined: 19 Feb 2007
Posts: 328
Followers: 1

Kudos [?]: 8 [0], given: 0

 [#permalink] New post 11 Jul 2007, 10:58
Thanks guys for the explanation...........i got confused with the number.......now its very clear
  [#permalink] 11 Jul 2007, 10:58
    Similar topics Author Replies Last post
Similar
Topics:
Blood banks will shortly start to screen all donors for NANB abhi758 8 14 Aug 2009, 12:18
Blood banks will shortly start to screen all donors for NANB themaddy2002 11 07 Nov 2006, 01:59
Blood banks will shortly start to screen all donors for NANB nakib77 3 01 Nov 2005, 03:42
Blood banks will shortly start to screen all donors for NANB crisnas 20 26 Sep 2005, 10:11
Blood banks will shortly start to screen all donors for NANB Janice 4 06 Dec 2004, 19:00
Display posts from previous: Sort by

Blood banks will shortly start to screen all donors for NANB

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

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®.