00:01
So out of 20 households, we need to know how many are watching the game.
00:04
They say, according to nilsson, 22 % are watching the game.
00:08
So first of all, we want to know the probability that none are watching the game.
00:13
So if the 22 % are watching the game, that means that 78 % are not watching the game.
00:21
So to get the probability of none, we're simply going to take that 78 % and raise it to the 20th power because we're talking about no.
00:30
Nobody watching the game.
00:33
So when i get that value on my calculator, i'm going to get .0064.
00:39
It says go to three digits, so we'll say .007.
00:43
Now i want to know the probability that at least one.
00:47
So probability of at least one means one to 20.
00:50
Well, that's a lot of work to do for all that.
00:52
So what we can do is say, well, we're excluding the zero.
00:56
So if we know the probability of zero, which we just found out, then we can simply if we say 1 minus that value and we'll have the probability of at least 1.
01:06
So when we say 1 minus 0 .007, we're going to get 0 .993.
01:12
Now i want to know the probability that at most 1...