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

It is currently 21 Aug 2014, 20:30

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

In a certain animal population, for each of the first 3

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Joined: 29 Oct 2004
Posts: 865
Followers: 2

Kudos [?]: 31 [0], given: 0

GMAT Tests User
In a certain animal population, for each of the first 3 [#permalink] New post 21 Jan 2005, 07:36
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
In a certain animal population, for each of the first 3 months of life, the probability that an animal will die during that month is 1/10. For a group of 200 newborn members of the population, approximately how many would be expected to survive the first 3 months of life?
(A) 140
(B) 146
(C) 152
(D) 162
(E) 170

Last edited by qhoc0010 on 21 Jan 2005, 12:18, edited 1 time in total.
Director
Director
User avatar
Joined: 31 Aug 2004
Posts: 609
Followers: 2

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

GMAT Tests User
 [#permalink] New post 21 Jan 2005, 07:54
I guess there is a flaw in your proba...
Senior Manager
Senior Manager
avatar
Joined: 25 Oct 2004
Posts: 250
Followers: 1

Kudos [?]: 5 [0], given: 0

GMAT Tests User
 [#permalink] New post 21 Jan 2005, 08:37
I agree with twixt, how can the probability be 101. The total probability of any event is 1.
SVP
SVP
User avatar
Joined: 03 Jan 2005
Posts: 2255
Followers: 12

Kudos [?]: 195 [0], given: 0

GMAT Tests User
 [#permalink] New post 21 Jan 2005, 11:54
I've seen that question. The probability in the question is 10%.
Director
Director
avatar
Joined: 19 Nov 2004
Posts: 565
Location: SF Bay Area, USA
Followers: 3

Kudos [?]: 28 [0], given: 0

GMAT Tests User
 [#permalink] New post 21 Jan 2005, 21:41
Expected value = Prob of survival for 3 months * Number of samples
E(x) = (9/10)*(9/10)*(9/10)*200 = 146
Director
Director
avatar
Joined: 29 Oct 2004
Posts: 865
Followers: 2

Kudos [?]: 31 [0], given: 0

GMAT Tests User
 [#permalink] New post 22 Jan 2005, 04:59
Got it, thx
OA is (B)
  [#permalink] 22 Jan 2005, 04:59
    Similar topics Author Replies Last post
Similar
Topics:
Animal population Madelaine88 0 12 Mar 2011, 11:48
2 Experts publish their posts in the topic In a certain population, there are 3 times as many people ag nsp007 6 05 May 2010, 12:56
1 In a certain animal population, for each of the first 3 mont Ginc 7 20 Aug 2008, 00:52
In a certain animal population, for each of the first 3 dshishkov 2 06 Nov 2004, 13:24
Of the 60 animals on a certain farm, 2/3 are either pigs or mba4me 2 12 Sep 2004, 00:44
Display posts from previous: Sort by

In a certain animal population, for each of the first 3

  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®.