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

It is currently 23 Jul 2014, 00:18

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

There are two lines of defence against an attacking

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 12 Dec 2004
Posts: 33
Followers: 0

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

There are two lines of defence against an attacking  [#permalink] New post 04 Jan 2005, 11:02
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
There are two lines of defence against an attacking
aircraft. 1st is missile and 2nd is anti-aircraft gun.
the respective prob. that the aircraft being hit by
the missile and the gun are 2/9 and 1/8 respcly.
what is the prob. of hitting the aircraft?
VP
VP
avatar
Joined: 30 Sep 2004
Posts: 1493
Location: Germany
Followers: 4

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

GMAT Tests User
 [#permalink] New post 04 Jan 2005, 13:11
...hit by the gun and / or the missile:

2/9 + 1/8 - 2/9 *1/8 = 23/72
VP
VP
avatar
Joined: 18 Nov 2004
Posts: 1447
Followers: 2

Kudos [?]: 15 [0], given: 0

GMAT Tests User
 [#permalink] New post 04 Jan 2005, 13:20
p(e) = p(m) + p (g) - p(g and m) = 2/9 + 1/8 - 2/72 = 23/72
Senior Manager
Senior Manager
avatar
Joined: 30 Dec 2004
Posts: 296
Location: California
Followers: 1

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

GMAT Tests User
 [#permalink] New post 04 Jan 2005, 22:40
Stupid question: Why do you subtract the product of the probabilities?

_________________

"No! Try not. Do. Or do not. There is no try.

Director
Director
User avatar
Joined: 31 Aug 2004
Posts: 609
Followers: 2

Kudos [?]: 16 [0], given: 0

GMAT Tests User
 [#permalink] New post 05 Jan 2005, 02:56
In case of a destruction by the missile, there is no way to destroy one more time the plane with the gun...
  [#permalink] 05 Jan 2005, 02:56
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic The body has two lines ofdefense against invaders such as ba blueseas 4 12 Aug 2013, 07:23
Two teams, X and Y played against each other in a tournament eybrj2 1 18 Feb 2012, 00:54
2 Two Triangles Leaning Against Same Wall - question capstone207 5 22 Sep 2009, 23:10
2 Experts publish their posts in the topic Two intersecting lines form four angles. Are the lines arjtryarjtry 3 26 Jul 2008, 00:52
There are two lines of defence against an attacking sandman 7 06 Nov 2005, 17:42
Display posts from previous: Sort by

There are two lines of defence against an attacking

  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®.