perplexus.info :: Probability : Cars on the road

Cars on the road (Posted on 2004-04-09)

If the probability of observing a car (read: at least one car) in 20 minutes on a highway is 609/625, what is the probability of observing a car (read: at least one) in 5 minutes (assuming constant default probability)?

See The Solution Submitted by SilverKnight

Rating: 2.5000 (4 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

answer

| Comment 1 of 22

ans: 3/5 i.e. 60%

no car in 20 min: 16/625

no car in 5 min: (16/625)^1/4=2/5

car in 5 min 1-2/5= 3/5= 60%

ady

Posted by Ady TZIDON on 2004-04-09 11:17:28

Please log in:

Login:
Password:
Remember me:

Sign up! \| Forgot password

Search:

Search body:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (10)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info