00:01
Okay, so here we have the probability that at most 3 -6 we want for the first part.
00:06
We have the distribution is binomial, so n p, where n is 50, and p is 1.
00:10
So the first part when probability of x is less than or equal to 3.
00:16
So this is going to be equal to, well, we get, so 50 choose 1 times 16, 7 times 1 minus 1, to 50 minus 1.
00:26
That's going to be, so we get 50 times one -sixth, and then times 5 -6th to 49th power.
00:41
And then we have plus, so 50 choose 2.
00:48
So that's going to be plus 12, 25, and then times 1 -6 squared, and then times 5 -6 to the 48th power.
01:02
And then we have plus 19, 600, so that's 50 choose three...