Re: propability, train stop
Quote:
Originally Posted by
stevetall
There are 5 train stops and 2 passengers. What is propability that both passengers DO NOT get off
on first two stops ( stop 1 and stop 2 ) ?
Does that mean that both do not get off at stop 1 and both do not get off at stop 2?
In other words the one could at 1 and the other at 2, but just not both at 1 or 2?
Re: propability, train stop
I see. Then it must be;
propability that both passengers DO NOT get off
on first two stops ( stop 1 AND stop 2 ) ?
- 1/5^2 = 1/25
Re: propability, train stop
"Does that mean that both do not get off at stop 1 and both do not get off at stop 2?" - YES
Propability that one can can get off on any stop is clearly 1/5.
And each of those two can get off on any stop he wants. 5 stops and two passengers, indeed.
First I thought 1/5^2 + 1/5^2
But now I think 1/5^2. But don't know...