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

It is currently 29 Jul 2014, 06:52

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

A lottery ticket vendor sells lottery tickets that, when

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1270
Location: Madrid
Followers: 23

Kudos [?]: 113 [0], given: 0

A lottery ticket vendor sells lottery tickets that, when [#permalink] New post 09 Jul 2006, 03:32
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A lottery ticket vendor sells lottery tickets that, when scratched, reveal whether or not the holder has won a prize. If each ticket has a 25% chance of carrying a prize, what is the lowest number of tickets that Diane could but that would ensure that grandmother would have at least a 75% chance of experiencing the thrill of winning a prize?

(A) 5 (B) 6 (C) 8 (D) 9 (E) 10
GMAT Instructor
avatar
Joined: 04 Jul 2006
Posts: 1270
Location: Madrid
Followers: 23

Kudos [?]: 113 [0], given: 0

 [#permalink] New post 11 Jul 2006, 00:20
Maybe if I gave granny a name, people would try the problem. Let's call her Della.
Manager
Manager
avatar
Joined: 04 Jul 2006
Posts: 57
Followers: 1

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

 [#permalink] New post 11 Jul 2006, 03:47
The formula for not winning with n lottery tickets is (1-1/4)^n=3/4^n^=(3/2^2)^n. This must be smaller than 1/4.
n=5: (3/4)^5=243/1024 < 256/1024=1/4

Therefore, (A) is the correct answer.
  [#permalink] 11 Jul 2006, 03:47
    Similar topics Author Replies Last post
Similar
Topics:
1 For a lottery ticket, Emily chose six numbers that average badgerboy 4 17 Oct 2009, 04:44
Out of 100 lottery tickets, each having 50% chance of Vlad77 12 06 Aug 2007, 09:15
Out of 100 lottery tickets, each having 50% chance of Caas 13 12 May 2007, 05:47
Each lottery ticket buyer was assigned a sequence of 3 joemama142000 10 10 Jan 2006, 16:56
In a lottery there are 900 tickets numbered consecutively gmattaker 4 05 Jan 2005, 19:01
Display posts from previous: Sort by

A lottery ticket vendor sells lottery tickets that, when

  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®.