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

It is currently 30 Sep 2014, 10:17

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

The probability that a sleeper bomb will blow up in any

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Expert Post
Founder
Founder
User avatar
Affiliations: UA-1K, SPG-G, HH-D
Joined: 04 Dec 2002
Posts: 12269
Location: United States (WA)
GMAT 1: 750 Q49 V42
GPA: 3.5
WE: Information Technology (Hospitality and Tourism)
Followers: 2293

Kudos [?]: 9027 [0], given: 3676

GMAT ToolKit User Premium Member CAT Tests
The probability that a sleeper bomb will blow up in any [#permalink] New post 19 Jun 2003, 01:31
Expert's post
The probability that a sleeper bomb will blow up in any given year is 5%.

If there is a sleeper bomb sitting in one of the canyons in the city of Monrovia what is the probability that it will blow up this year if it has been sitting there already for 10 years?
Manager
Manager
User avatar
Joined: 03 Jun 2003
Posts: 84
Location: Uruguay
Followers: 1

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

 [#permalink] New post 19 Jun 2003, 07:09
I don┬┤t understand the question, but if each year is independent to the other, I mean if each year has a 5% probability no matter how many years, then the prob is 5% like any other year (it seems too easy)

Can you explain the question
thanks
Expert Post
Founder
Founder
User avatar
Affiliations: UA-1K, SPG-G, HH-D
Joined: 04 Dec 2002
Posts: 12269
Location: United States (WA)
GMAT 1: 750 Q49 V42
GPA: 3.5
WE: Information Technology (Hospitality and Tourism)
Followers: 2293

Kudos [?]: 9027 [0], given: 3676

GMAT ToolKit User Premium Member CAT Tests
 [#permalink] New post 24 Jun 2003, 23:09
Expert's post
OK, my mistake. Let me rephrase the problem:

The probability that a sleeper bomb will blow up in any given year is 5%.

If there is a sleeper bomb sitting in one of the canyons in the city of Monrovia what is the probability that it will blow up this year if it has been sitting there already for 10 years and no sleeper bomb has ever lasted more than 20 years without blowing up?


P.S. I thought it would be clear from the 5% deal that it will last for 20 years, but it is not; I am sorry about that. Basically the life of the bomb is 20 years - it will for sure blow up at the end of that time.
Manager
Manager
User avatar
Joined: 24 Jun 2003
Posts: 147
Location: India
Followers: 1

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

How about this one? [#permalink] New post 25 Jun 2003, 06:52
The probability is 10%

The bomb will last ten years more at most and therefore the probability of it going off in any of the next ten years is 1/10 = 10%
Manager
Manager
User avatar
Joined: 03 Jun 2003
Posts: 84
Location: Uruguay
Followers: 1

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

 [#permalink] New post 25 Jun 2003, 11:47
I agree with prashant it has to be a 10%

If I have a 20 year period, then I have a 5% probability in each year. If time is reduced to ten years, then prob increases to 10%.
Manager
Manager
User avatar
Joined: 25 Jun 2003
Posts: 96
Followers: 1

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

 [#permalink] New post 25 Jun 2003, 11:51
If it is true that odds of blowing up of the bomb increases every year by the percent of remaining yers , then % of blowing up the bomb in 11th year is 100/9 = 11.11 ( Bomb did not blow up in the past 10 years )
:beat
_________________

Brainless

Expert Post
Founder
Founder
User avatar
Affiliations: UA-1K, SPG-G, HH-D
Joined: 04 Dec 2002
Posts: 12269
Location: United States (WA)
GMAT 1: 750 Q49 V42
GPA: 3.5
WE: Information Technology (Hospitality and Tourism)
Followers: 2293

Kudos [?]: 9027 [0], given: 3676

GMAT ToolKit User Premium Member CAT Tests
 [#permalink] New post 25 Jun 2003, 15:22
Expert's post
Hm... I personally thought it would be adding up :oops: when I was coming up with the problem. I wonder if there is a case when probability would add up? Any ideas?
Manager
Manager
User avatar
Joined: 24 Jun 2003
Posts: 147
Location: India
Followers: 1

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

How about this one? [#permalink] New post 26 Jun 2003, 00:54
brainless:

the probability is 1/9=11.11% if you assume that you are at the end of the 11th year. But if you are at the beginning of the 11th year, then the probability of the bomb going off in that year is 1/10=10%

bb: the probabilities are additive because

(the bomb goes off in 11th year) OR (in 12th year) OR.... etc.
How about this one?   [#permalink] 26 Jun 2003, 00:54
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic I bombed up the GMAT with a 540 ... !!! TheNona 1 15 Feb 2013, 14:47
3 Probability - Multiplying any # from A with any # in B gmatt14 6 23 Apr 2010, 10:43
What is the probability of having a coin come up heads at GMATT73 5 21 Aug 2006, 08:39
If a coin has a probability of landing heads up or tails TeHCM 2 26 Dec 2005, 18:06
The probability that a coin falls heads up is 50%. What is forumsmba 1 04 Dec 2004, 16:58
Display posts from previous: Sort by

The probability that a sleeper bomb will blow up in any

  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®.