It is currently 19 Nov 2017, 09:31

### 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

# How likely is a bird to be classified as positive?

Author Message
TAGS:

### Hide Tags

Intern
Joined: 18 Oct 2012
Posts: 7

Kudos [?]: 29 [0], given: 11

How likely is a bird to be classified as positive? [#permalink]

### Show Tags

16 Nov 2012, 01:56
1
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

58% (01:04) correct 42% (00:46) wrong based on 257 sessions

### HideShow timer Statistics

How likely is a bird to be classified as positive?

(1) 80 percent of birds with avian flu are classified as positive.

(2) 5 percent of birds without avian flu are classified as positive.
[Reveal] Spoiler: OA

Kudos [?]: 29 [0], given: 11

VP
Status: Been a long time guys...
Joined: 03 Feb 2011
Posts: 1378

Kudos [?]: 1703 [1], given: 62

Location: United States (NY)
Concentration: Finance, Marketing
GPA: 3.75
Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

16 Nov 2012, 02:32
1
KUDOS
I doubt the OA.
Do also mention the source please.
_________________

Kudos [?]: 1703 [1], given: 62

Intern
Joined: 18 Oct 2012
Posts: 7

Kudos [?]: 29 [0], given: 11

Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

16 Nov 2012, 02:38
I got it from my course materials. I believe it is from Barrons - 2007 / Test 1, but I didn't find it on the internet. (this is what it is written on the Test materials as a source). I also doubt the OA and completely do not agree with it.

Kudos [?]: 29 [0], given: 11

Math Expert
Joined: 02 Sep 2009
Posts: 42250

Kudos [?]: 132697 [0], given: 12335

Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

16 Nov 2012, 05:12
Expert's post
1
This post was
BOOKMARKED
Anichka wrote:
How likely is a bird to be classified as positive?

(1) 80 percent of birds with avian flu are classified as positive.

(2) 5 percent of birds without avian flu are classified as positive.

The answer to this question is E, not D. We need to know the percentage of birds with avian flu to answer the question.
_________________

Kudos [?]: 132697 [0], given: 12335

Intern
Joined: 22 Jul 2013
Posts: 12

Kudos [?]: -18 [0], given: 3

GMAT 1: 650 Q48 V31
Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

24 Oct 2013, 17:26
Bunuel wrote:
Anichka wrote:
How likely is a bird to be classified as positive?

(1) 80 percent of birds with avian flu are classified as positive.

(2) 5 percent of birds without avian flu are classified as positive.

The answer to this question is E, not D. We need to know the percentage of birds with avian flu to answer the question.

Hi bunuel

This question looks very abstract . How can one define which bird is considered to be positive?

Kudos [?]: -18 [0], given: 3

Senior Manager
Joined: 23 Oct 2010
Posts: 381

Kudos [?]: 403 [0], given: 73

Location: Azerbaijan
Concentration: Finance
Schools: HEC '15 (A)
GMAT 1: 690 Q47 V38
Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

24 Oct 2013, 21:26
overlapping sets question -

Avian flue // Non-avian flue
Positive 0.8 (TA) 0.05(NA)
not Positive
============================
Total Avian flue(TA) //Total Non-avian flue

Positive =0.8TA+0.05Na
since we dont know TA and NA, we cant find total positive
_________________

Happy are those who dream dreams and are ready to pay the price to make them come true

I am still on all gmat forums. msg me if you want to ask me smth

Kudos [?]: 403 [0], given: 73

Current Student
Joined: 21 Oct 2013
Posts: 193

Kudos [?]: 45 [0], given: 19

Location: Germany
GMAT 1: 660 Q45 V36
GPA: 3.51
Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

16 Jan 2014, 04:46
Lol strange question. Looked at it, went straight for E.

Reasoning: If there were 1000 birds, of which have 100 the avian flu, 80 would be positive and of the other 900 45 were positive. But since we don't know nothing about any total percents or numbers, we can't solve! Hence E. Pretty awkward though.

Kudos [?]: 45 [0], given: 19

Non-Human User
Joined: 09 Sep 2013
Posts: 15658

Kudos [?]: 282 [0], given: 0

Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

11 Aug 2015, 03:05
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

Kudos [?]: 282 [0], given: 0

Director
Joined: 04 Jun 2016
Posts: 647

Kudos [?]: 377 [0], given: 36

GMAT 1: 750 Q49 V43
Re: How likely is a bird to be classified as positive? [#permalink]

### Show Tags

05 Aug 2016, 08:00
Anichka wrote:
How likely is a bird to be classified as positive?

(1) 80 percent of birds with avian flu are classified as positive.

(2) 5 percent of birds without avian flu are classified as positive.

The moment you see "How likely" ? you should realise that it is asking about Positive bird /Total Bird

Since Both the statments are talking about % values , we cannot calcualte the NUMBER of BIRDS
we dont know 80% of what (What is total number of birds in question)
same with statement 2

_________________

Posting an answer without an explanation is "GOD COMPLEX". The world doesn't need any more gods. Please explain you answers properly.
FINAL GOODBYE :- 17th SEPTEMBER 2016. .. 16 March 2017 - I am back but for all purposes please consider me semi-retired.

Kudos [?]: 377 [0], given: 36

Re: How likely is a bird to be classified as positive?   [#permalink] 05 Aug 2016, 08:00
Display posts from previous: Sort by