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Parking Cars (Posted on 2004-07-01) Difficulty: 5 of 5
There is an east-west street of length L units. And we park cars of unit length along the north side until we can't place any more cars. Each car is placed randomly (uniformly).

What is the expected number of cars that can be parked (as a function of L)?
__________________________

I'll start you off...

For 0 <= L < 1, F(L) = 0
For 1 <= L < 2, F(L) = 1

Okay... now the easy ones are out of the way, can you describe the function for L>=2?

No Solution Yet Submitted by SilverKnight    
Rating: 4.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: simulation--bug fix, but doesn't change answers | Comment 9 of 14 |
(In reply to simulation by Charlie)

The line

sb = sb + 1
 

should not be in the program. It was left from when the FOR... NEXT loop was a DO... LOOP loop.  However, it did not affect results, which only depended on fillable spaces being filled; it did not depend on the order of their filling--I've verified the results are the same.  It does however slow down the simulation, as cars were turned away even though there were spaces available in untried spaces, though later-arriving cars filled the preferred spaces so the non-preferred spaces got into preferred locations in the array.


  Posted by Charlie on 2004-07-02 08:16:52
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