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

 It is currently 24 Mar 2017, 09:06

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

Questions 1-2 are based on the following. Blood banks will

Author Message
TAGS:

Hide Tags

Manager
Joined: 06 May 2009
Posts: 76
Followers: 2

Kudos [?]: 100 [0], given: 3

Questions 1-2 are based on the following. Blood banks will [#permalink]

Show Tags

28 Jun 2009, 23:12
00:00

Difficulty:

(N/A)

Question Stats:

67% (02:12) correct 33% (01:47) wrong based on 18 sessions

HideShow timer Statistics

Questions 1-2 are based on the following.
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.
1. 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.

2. 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.
If you have any questions
New!
Retired Moderator
Status: The last round
Joined: 18 Jun 2009
Posts: 1309
Concentration: Strategy, General Management
GMAT 1: 680 Q48 V34
Followers: 79

Kudos [?]: 1041 [0], given: 157

Show Tags

28 Jun 2009, 23:36
For first one: I am confused with D & E. 10% of actual donors & 2/3 of NANB : there is a difference in actual vs NANB infected cases.

For second one:

It can be "D"

Kindly confirm my thinking!!
_________________
Manager
Joined: 15 May 2009
Posts: 171
Followers: 4

Kudos [?]: 26 [0], given: 3

Show Tags

28 Jun 2009, 23:48
ankur55 wrote:
Questions 1-2 are based on the following.
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.
1. 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.

Using the negation test, I find (A) to be the best answer. If a large percentage of carriers can be detected because they carry other infections, then the actual number of carriers who end up donating will be reduced; they will be filtered out by other tests.

Quote:
2. 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.

The safest answer here would be (D). We know the new test will disqualify a percentage of potential donors that is greater than 0 & less than 5. So, all else being equal, we can expect the available blood supplies to decrease, since less people are able to donate.
Manager
Joined: 06 May 2009
Posts: 76
Followers: 2

Kudos [?]: 100 [0], given: 3

Show Tags

29 Jun 2009, 01:32
Yes indeed OA is A and D
Thanks, understood the explanation.
Senior Manager
Joined: 15 Jan 2008
Posts: 291
Followers: 2

Kudos [?]: 39 [0], given: 3

Show Tags

30 Jun 2009, 00:14
Nice tough question..
A and D should be the answers..
Manager
Joined: 17 Apr 2009
Posts: 160
Followers: 0

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

Show Tags

24 Jul 2009, 03:27
ankur55 wrote:
Questions 1-2 are based on the following.
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.
1. 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.

Using the negation test, I find (A) to be the best answer. If a large percentage of carriers can be detected because they carry other infections, then the actual number of carriers who end up donating will be reduced; they will be filtered out by other tests.

Quote:
2. 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.

The safest answer here would be (D). We know the new test will disqualify a percentage of potential donors that is greater than 0 & less than 5. So, all else being equal, we can expect the available blood supplies to decrease, since less people are able to donate.

for 1st question why cant the ans be E.If you apply the negation test to E,then it would be that the donors are not donating blood at the aveg frequency as other donors,then also their number would decrease.
Manager
Joined: 07 Jun 2009
Posts: 211
Followers: 1

Kudos [?]: 40 [0], given: 9

Show Tags

24 Jul 2009, 03:48
Good question..
A and D for me too..
_________________

Senior Manager
Joined: 17 Jul 2009
Posts: 298
Concentration: Nonprofit, Strategy
GPA: 3.42
WE: Engineering (Computer Hardware)
Followers: 1

Kudos [?]: 41 [0], given: 9

Show Tags

24 Jul 2009, 17:49
shrutisingh wrote:
ankur55 wrote:
Questions 1-2 are based on the following.
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.
1. 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.

Using the negation test, I find (A) to be the best answer. If a large percentage of carriers can be detected because they carry other infections, then the actual number of carriers who end up donating will be reduced; they will be filtered out by other tests.

Quote:
2. 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.

The safest answer here would be (D). We know the new test will disqualify a percentage of potential donors that is greater than 0 & less than 5. So, all else being equal, we can expect the available blood supplies to decrease, since less people are able to donate.

for 1st question why cant the ans be E.If you apply the negation test to E,then it would be that the donors are not donating blood at the aveg frequency as other donors,then also their number would decrease.

to my understanding, E can't be the answer because the article talked about each donor, so for example. a donor that donates multiple times a year is the same as a donor that donate one time a year...so the frequency is not discussed in this passage?
Manager
Joined: 08 Jul 2009
Posts: 174
Followers: 3

Kudos [?]: 82 [0], given: 13

Show Tags

31 Jul 2009, 14:31
A and D make most sense to me
Manager
Joined: 14 Apr 2008
Posts: 52
Followers: 0

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

Show Tags

01 Aug 2009, 16:35
a and d for me too
Manager
Joined: 01 Jul 2009
Posts: 138
Location: India
Concentration: Entrepreneurship, Strategy
GMAT 1: 680 Q48 V35
GPA: 3.8
WE: General Management (Retail)
Followers: 26

Kudos [?]: 504 [0], given: 13

Show Tags

02 Aug 2009, 09:40
I had thought for E & D. but now i get why its has to be A for first question
_________________

i love kudos consider giving them if you like my post!!

http://gmatclub.com/forum/critical-reasoning-for-beginners-82111.html
QUANT NOTES FOR PS & DS: notes to help you do better in Quant. Click Below
http://gmatclub.com/forum/quant-notes-for-ps-ds-82447.html
GMAT Timing Planner: This little tool could help you plan timing strategy. Click Below
http://gmatclub.com/forum/gmat-cat-timing-planner-82513.html

Intern
Joined: 31 Mar 2014
Posts: 20
Concentration: Operations, General Management
Schools: IIMA (PGPX)
Followers: 0

Kudos [?]: 11 [0], given: 1

Re: Questions 1-2 are based on the following. Blood banks will [#permalink]

Show Tags

26 Aug 2014, 19:56
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 passage is about attributes of blood donated by donors and conclusion drawn from it.
Con: Roughly, 10% of donors will supply nanb 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.

Indeed it is correct: Yes, at the time of taking blood, if hospitals conduct routine tests for other diseases, then they will be rejected by other means . Thus arugment breaks.

(B) Donors carrying NANB hepatitis do not, in a large percentage of cases, develop the disease themselves at any point.
We are talking about contaminiation of blood because of hepatitis blood donors. Impact on the donors itselt is out of scope.
(C) The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
I am not getting into stastics. Out of scope. It doesn't matter if 1000 people donate and i estimate at 10%. Concern is 10% of donors supply contaminated blood.
(D) The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
We are not comparing.
(E) The donors who will still supply NANB-contaminated blood will donate blood at the average frequency for all donors

Here we are comparing the frequency of blood donation . Each specific time is considered a donor. Out of scope.
Re: Questions 1-2 are based on the following. Blood banks will   [#permalink] 26 Aug 2014, 19:56
Similar topics Replies Last post
Similar
Topics:
3 Questions 19-20 are based on the following. Blood banks will 19 17 Aug 2009, 09:33
8 Questions 9-10 are based on the following. In the 9 30 Jan 2008, 06:39
The following questions are based on this passage: At an 9 08 Jan 2008, 11:14
Questions 1-2 are based on the following. Half of the 4 24 May 2007, 03:54
Questions 1-2 are based on the following. Blood banks will 5 21 May 2007, 08:43
Display posts from previous: Sort by