00:01
Tevin bought a bag of cookies.
00:03
In that bag, there were four chocolate chip, there were seven peanut butter cookies, there were eight sugar cookies, and nine oatmeal cookies.
00:13
So there were a total of 28 cookies in the bag.
00:18
And we want to determine the probability that tevin randomly selects an oatmeal raisin cookie, she eats it, and then she gets another.
00:30
Oatmeal raisin cookie.
00:34
So this is dependent probability and to find the probability of event a, then event b when it's dependent probability, we find the probability of the first event, and we multiply it by the probability of the second event given the fact that the first event occurred.
00:54
So we need to find the probability of the first event, the probability of getting an oatmeal raisin cookie.
01:01
And probability is favorable over possible.
01:04
So there's nine favorable cookies in the bag out of 28 possible in the bag.
01:10
Now after she gets that cookie and she eats it, there are no longer nine oatmeal raisin cookies in the bag...