00:01
Two dice are rolled at the same time.
00:02
We want the probability that the sum equals two.
00:07
So imagine we have these two dice.
00:09
I'll call them x and y.
00:11
On each of them we could get six different outcomes.
00:14
We could roll anything from a one up to a six.
00:19
I'm going to look at the different sums we might get and their probabilities of occurring.
00:25
So an outcome, a simple outcome, will look like this.
00:30
Something on x, something on y.
00:32
If you imagine the dice being different colours, that makes this a easier.
00:36
So for example you might throw them and see a two on die x and a three on die y.
00:42
Or throw them and see three on x, two on y...