00:01
All right, so we're looking at the traffic patterns here, and we can use the poisson probability distribution to look at the probabilities.
00:11
And we know that, or we're told, that automobiles arrive at this given exit at a rate of two per minute.
00:19
So that would be the mean.
00:21
That's our mean there.
00:22
It's two.
00:23
So the probability that no automobiles arrive in a particular minute, and then at least one.
00:28
So i'm going to make a little start with a little table here.
00:33
Just zero to three is fine.
00:36
And we want to find probabilities of zero, one, two, three, because we're going to do some little work with those values.
00:47
That no automobiles arrive, but it's just zero.
00:50
So x is zero.
00:53
So we're told mu is two.
00:56
So equals, we're going to use this formula here...