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

 It is currently 26 Mar 2015, 18:26

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# There is a 90% chance that a registered voter in Burghtown

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Director
Joined: 07 Nov 2004
Posts: 695
Followers: 4

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

There is a 90% chance that a registered voter in Burghtown [#permalink]  30 Nov 2004, 09:34
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
There is a 90% chance that a registered voter in Burghtown voted in the last election. If five registered voters are chosen at random, what is the approximate likelihood that exactly four of them voted in the last election?

A) 26.2%

B) 32.8%

C) 43.7%

D) 59.0%

E) 65.6%
Director
Joined: 21 Sep 2004
Posts: 618
Followers: 1

Kudos [?]: 6 [0], given: 0

[#permalink]  30 Nov 2004, 09:42
using Binomial Theorem

nCr(p)^r (q)^n-r

5C4 (.90)^4 (0.1)

=.328
=32.8%
Director
Joined: 31 Aug 2004
Posts: 606
Followers: 3

Kudos [?]: 40 [0], given: 0

[#permalink]  30 Nov 2004, 09:45
In using Bernoulli

5C4.(0.9)^4.(1-0.9)^1 = 5*0.1*0.6561=0.328 id est 32.8%

B it is.
[#permalink] 30 Nov 2004, 09:45
Similar topics Replies Last post
Similar
Topics:
2 Fully one third of registered voters, according to recent 10 07 Jun 2011, 05:43
. In a certain city, 60 percent of the registered voters are 3 18 Mar 2011, 13:35
4 There is a 90% chance that a registered voter in Burghtown 18 08 Dec 2007, 08:24
There is a 90% chance that a registered voter in Burghtwon 5 30 Oct 2005, 21:14
There is a 90% chance that a registered voter in Burghtown 3 18 Sep 2005, 00:00
Display posts from previous: Sort by

# There is a 90% chance that a registered voter in Burghtown

 Question banks Downloads My Bookmarks Reviews Important topics

 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®.