00:01
So this is a binomial situation.
00:03
First of all, they tell us that there's a 23 .9 % of the car engines are going to fail if they haven't had routine maintenance.
00:11
And they're asking about the chance that they will not have engine failure.
00:15
So to find our p probability in this problem, we're first going to find the complement.
00:20
So if i take 1 minus 0 .239, i get 0 .761.
00:29
That's going to be my p, my probability.
00:34
My n is 21 cars.
00:39
And my x, the number of quote successes, is exactly 10 cars.
00:45
This is a binomial situation.
00:47
It checks all the boxes for that.
00:51
It's success or failure, same probability for each car, independence, etc...