Last visit was: 14 Dec 2024, 13:40 It is currently 14 Dec 2024, 13:40
Home
GMAT
Messages
Tests
Schools
Reviews
Social
Chat
My Profile
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
aps_can
User avatar
Joined: 30 May 2003
Last visit: 19 Dec 2005
Posts: 68
Own Kudos:
5
Location: Toronto
Posts: 68
Kudos: 5
In an insurance company, each policy has a paper record and 18 Aug 2003, 00:22
Kudos
Add Kudos
Bookmarks
Bookmark this Post
23. In an insurance company, each policy has a paper record and an
electric record. For those policies having incorrect paper record,
60% also having incorrect electric record; For those policies having incorrect electric record, 75% also having incorrect paper record. 3% of all policies have both incorrect paper and incorrect electric records. If we randomly pick out one policy, what's the probability that the one having both correct paper and correct electric records?



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
aps_can
User avatar
Joined: 30 May 2003
Last visit: 19 Dec 2005
Posts: 68
Own Kudos:
5
Location: Toronto
Posts: 68
Kudos: 5
In an insurance company, each policy has a paper record and 18 Aug 2003, 00:26
Kudos
Add Kudos
Bookmarks
Bookmark this Post
A's breakfast has 2 chiken sandwish and 4 cheese sandwish;
B's breakfast has 3 chiken sadwish and 5 cheese sandwish. Choosing 1 from each meal randomly, what is the probability of both are chicken?
User avatar
aps_can
User avatar
Joined: 30 May 2003
Last visit: 19 Dec 2005
Posts: 68
Own Kudos:
5
Location: Toronto
Posts: 68
Kudos: 5
In an insurance company, each policy has a paper record and 18 Aug 2003, 00:57
Kudos
Add Kudos
Bookmarks
Bookmark this Post
are we not considering the probability of choosing 1 out of the 2 dishes i.e. 1/2*1/8=1/16????
User avatar
bono
User avatar
Joined: 28 Feb 2003
Last visit: 12 Jul 2007
Posts: 96
Own Kudos:
13
Location: Kiev
Posts: 96
Kudos: 13
In an insurance company, each policy has a paper record and 18 Aug 2003, 02:01
Kudos
Add Kudos
Bookmarks
Bookmark this Post
agree with aps_can

prashant, could you explain your answers pls
avatar
kheriapiyush@indiatimes.c
avatar
Joined: 18 Jul 2003
Last visit: 19 May 2004
Posts: 6
Location: Mumbai
Posts: 6
Kudos: 0
In an insurance company, each policy has a paper record and 18 Aug 2003, 02:15
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Answer to 1st one = 0.88

Answer to the sandwich question = 17/48
User avatar
Dmitry
User avatar
Joined: 11 Jun 2003
Last visit: 25 Jan 2004
Posts: 58
Location: Moscow, Russia
Posts: 58
Kudos: 0
In an insurance company, each policy has a paper record and 18 Aug 2003, 07:06
Kudos
Add Kudos
Bookmarks
Bookmark this Post
3%/60% + 3%/75% - 3% = 6%
100% - 6% = 94%
User avatar
prashant
User avatar
Joined: 24 Jun 2003
Last visit: 29 Mar 2004
Posts: 70
Own Kudos:
5
Location: India
Posts: 70
Kudos: 5
In an insurance company, each policy has a paper record and 18 Aug 2003, 07:31
Kudos
Add Kudos
Bookmarks
Bookmark this Post
prashant
aps_can
23. In an insurance company, each policy has a paper record and an
electric record. For those policies having incorrect paper record,
60% also having incorrect electric record; For those policies having incorrect electric record, 75% also having incorrect paper record. 3% of all policies have both incorrect paper and incorrect electric records. If we randomly pick out one policy, what's the probability that the one having both correct paper and correct electric records?

Answer is 0.94


Here's the explanation:

Let the total no. of policies be T
Let no. of incorrect paper be x
Let no. of incorrect electric be y

Now 0.03*T = 0.6*x = 0.75*y

The required probability is [T-(x+y-0.03*T)]/T

Substituting and solving, we get the required prob. as 0.94
User avatar
prashant
User avatar
Joined: 24 Jun 2003
Last visit: 29 Mar 2004
Posts: 70
Own Kudos:
5
Location: India
Posts: 70
Kudos: 5
In an insurance company, each policy has a paper record and 18 Aug 2003, 07:34
Kudos
Add Kudos
Bookmarks
Bookmark this Post
prashant
aps_can
A's breakfast has 2 chiken sandwish and 4 cheese sandwish;
B's breakfast has 3 chiken sadwish and 5 cheese sandwish. Choosing 1 from each meal randomly, what is the probability of both are chicken?

1/8


P(both chicken) = P(chicken from meal 1)*P(chicken from meal 2)

= 2/6*3/8 = 1/8
User avatar
aps_can
User avatar
Joined: 30 May 2003
Last visit: 19 Dec 2005
Posts: 68
Own Kudos:
5
Location: Toronto
Posts: 68
Kudos: 5
In an insurance company, each policy has a paper record and 18 Aug 2003, 08:32
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Thanks for the solving Q1 & Q2

In how many ways 30 couples(total=30 men and 30 women...with respective man sitting on the right of woman) and 30 HOD(head of the department) be seated around a round table if each of the couple should sit between each of the HOD?



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderator:
yashikaaggarwal
Senior Moderator - Masters Forum
3116 posts