00:01
Vehicles on the freeway can turn right, left or go straight.
00:06
We want to list all the outcomes in the event that they go in the same direction.
00:13
Okay, so they could all go left, left, left, left, for each vehicle.
00:20
They could all go right, or they could all go straight.
00:25
So there are three outcomes in this event.
00:28
B, they all take different directions.
00:35
So for example, it could be left, right, straight.
00:38
That's one possibility here.
00:40
Now i need to know every unique order to put these in.
00:43
So i'm going to make my life a little bit easier by knowing how many outcomes will be in the event.
00:49
How many ways are there to put these three unique things in order? 3 factorial, which is 6.
00:56
So it should be 6 orders.
00:59
So i just write them up.
01:06
There they are.
01:07
Part c, two of them turn right.
01:19
So for example, right, right, left, right, straight, right, left, right, right, straight, right, right, left, right, straight, right, right.
01:34
There we go...