00:01
In this question, we're given a coin is tossed three times, where the sequence of heads and tails is observed.
00:08
I'm going to let h denote the event a head appears in a toss, and t denotes the event a tail appears in a toss.
00:17
Now, the outcome will be listed in the sample space.
00:22
All the possible outcomes are head, head, head, or head, tail, or head, tail, head, or head, or.
00:32
Or tail -hid -hid or head -tail or head -tail or tail -hid -tail or tail -tail -tail -tail -tail or tail -tail -tail.
00:47
You can see that the total number of outcomes is eight of them.
00:53
Now in b we want to find probability at least one head appears.
00:57
I'm going to take one and minus of the complement to this case would be probability no head appears.
01:04
So no head at all.
01:09
So that would be the case of only tail -tale -tail...