Last visit was: 08 Jun 2024, 07:27 It is currently 08 Jun 2024, 07:27
Decision Tracker
My Rewards
Unanswered
Active Topics
New posts
New comers' posts
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

The probability of safely crossing the street in New York is

avatar
araspai
Manager
Manager
Joined: 27 Jul 2003
Posts: 95
Own Kudos [?]: 177 [0]
Given Kudos: 0
Location: Singapore
Send PM
The probability of safely crossing the street in New York is [#permalink] The probability of safely crossing the street in New York is   20 Aug 2003, 06:09
The probability of safely crossing the street in New York is 0.4. If Padma crosses 3 streets everyday, What is the probability that she would safely cross one of the streets?
a. 0.064 b. 0.144 c. 0.216 d. 0.432 e. 0.936



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
javropu
Manager
Manager
Joined: 14 Aug 2003
Posts: 56
Own Kudos [?]: 2 [0]
Given Kudos: 0
Location: barcelona
Send PM
Re: The probability of safely crossing the street in New York is [#permalink] The probability of safely crossing the street in New York is   20 Aug 2003, 07:21
the answer should be 0,4... however, if we are asked whats the probability that padma is safe after crossing the 3 streets, answer is 0,4^3=0,064
User avatar
Brainless
Manager
Manager
Joined: 25 Jun 2003
Posts: 54
Own Kudos [?]: 5 [0]
Given Kudos: 0
Send PM
Re: The probability of safely crossing the street in New York is [#permalink] The probability of safely crossing the street in New York is   20 Aug 2003, 11:58
Agree..

What is the pprobability that Padma did not make it safely across the street ?
User avatar
mciatto
Manager
Manager
Joined: 10 Jun 2003
Posts: 134
Own Kudos [?]: 32 [0]
Given Kudos: 0
Location: Maryland
Send PM
Re: The probability of safely crossing the street in New York is [#permalink] The probability of safely crossing the street in New York is   20 Aug 2003, 12:39
Brainless wrote:
Agree..

What is the pprobability that Padma did not make it safely across the street ?


Short way is 1-(.4)(.4)(.4) = .936

Long way is

Prob she gets hit the first time = .6
Prob she gets hit the second time = .4*.6 = .24
Prob she gets hit the third tie = .4*.4*.6 = .096

Add those three up and you get .936
User avatar
Brainless
Manager
Manager
Joined: 25 Jun 2003
Posts: 54
Own Kudos [?]: 5 [0]
Given Kudos: 0
Send PM
Re: The probability of safely crossing the street in New York is [#permalink] The probability of safely crossing the street in New York is   20 Aug 2003, 13:32
mciatto wrote:
Brainless wrote:
Agree..

What is the pprobability that Padma did not make it safely across the street ?


Short way is 1-(.4)(.4)(.4) = .936

Long way is

Prob she gets hit the first time = .6
Prob she gets hit the second time = .4*.6 = .24
Prob she gets hit the third tie = .4*.4*.6 = .096

Add those three up and you get .936


Wonderful !!

Probability of AT LEAST one = 1 - P(NONE)



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!
GMAT Club Bot
gmatclubot
Re: The probability of safely crossing the street in New York is [#permalink]
20 Aug 2003, 13:32
Moderator:
yashikaaggarwal
Senior Moderator - Masters Forum
3131 posts