00:01
For this exercise, we are told that two dice are thrown, and event e is the sum of the dice is odd.
00:09
Event f is the first die is a one, and event g is the sum of the dice is five.
00:18
And we're asked to list the following outcomes.
00:22
For a, e intersect f.
00:26
So this is the outcome where both e and f must have occurred.
00:31
So f is the first die is a 1, so that means we are dealing only with this column.
00:40
And e is the sum of the dice is odd.
00:44
So that's going to be these outcomes here.
00:48
So we can say 1 and 2, 1 and 4, and 1 in 5.
01:00
And we can say those are an element of e and f.
01:05
And for b it's e or f, e union f.
01:10
So that means that either event e or e, e, or e, event f must have happened, either one or both.
01:21
So event e is all of these.
01:23
Sorry, that's event f.
01:25
And event e is the dice, the sum is odd.
01:29
So we're going to have all of these diagonals.
01:43
And so these are all the pairs of dice that constitute events e or f...