00:01
The question tells us a standard die is rolled.
00:03
P of a is the probability of rolling a 3.
00:06
P of b is the probability of rolling an even number.
00:09
What is the probability of a or b? well, we know the numbers on a standard die are 1, 2, 3, 4, 5, and 6.
00:17
So 6 numbers total.
00:19
And obviously, there's only 1 3 on a die.
00:22
So the probability of a, which is the probability of rolling in 3, is 1 out of 6.
00:26
Because there's one number we want and 6 numbers total.
00:31
Next, we know the even numbers on the die are 2, 4, and 6.
00:34
So there's 3 even numbers and 6 numbers total on the die...