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

 It is currently 05 May 2015, 07:02

### 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

# The probability that it will rain in NYC on any given day in

Author Message
TAGS:
Intern
Joined: 18 Dec 2006
Posts: 5
Followers: 0

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

The probability that it will rain in NYC on any given day in [#permalink]  08 Jan 2007, 23:14
The probability that it will rain in NYC on any given day in July is 30%. what is the probability that it will rain on exactly 3 days from July 5 to July 10 ?
Director
Joined: 26 Feb 2006
Posts: 905
Followers: 4

Kudos [?]: 52 [0], given: 0

Re: Probability [#permalink]  08 Jan 2007, 23:29
93.santosh wrote:
The probability that it will rain in NYC on any given day in July is 30%. what is the probability that it will rain on exactly 3 days from July 5 to July 10 ?

I assume the begaining and ending days are included. if so,

= 6C3 (0.3)^3 (1-0.3)^(6-3)
Manager
Joined: 04 Oct 2006
Posts: 189
Followers: 1

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

Agreed

.3*.3*.3*.7*.7*.7 = .009261

* 6c3 (20)

= 18.5%
_________________

wall street...bulls, bears, people from connecticut

Senior Manager
Joined: 24 Nov 2006
Posts: 351
Followers: 1

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

Yep. Typical binomial distribution:

prob = 6C3 * 0.3^3 * 0.7^(6-3)

Cheers
Similar topics Replies Last post
Similar
Topics:
1 If the probability of rain on any given day in city X is 5 21 Feb 2008, 07:11
3 If the probability of rain on any given day in Chicago 7 23 Jan 2008, 13:11
If the probability of rain on any given day in Chicago 2 20 Dec 2006, 02:27
The probability that it will rain in NYC on any given day in 1 09 Oct 2006, 10:44
The probability that it will rain in NYC on any given day in 4 07 Aug 2006, 15:22
Display posts from previous: Sort by