00:01
Let's say i wanted to toss a coin.
00:04
Let's say i have a coin and of course a coin is either going to be heads or tails.
00:11
Those are the only two possible options.
00:16
Let's say i toss it once.
00:18
I toss it once.
00:20
If i toss a coin once that means that let's say i have coin one and coin two.
00:26
Let's make a little table here.
00:28
Either the first coin can be heads, the second coin can also be heads, or the first coin can be heads and the second coin can be tails.
00:41
Another option is the first coin is tails, the second coin is heads, or they're both tails.
00:46
These are your four options you can get from costing two coins.
00:50
Let's look at the probability of getting heads.
00:56
The probability of getting one head, so one h, sorry zero h's.
01:01
Let's start with zero h's.
01:04
Well that's only one of these four.
01:05
That's only the bottom one when both are tails.
01:08
Because there's four total options only one of them gives you zero heads.
01:15
Let's actually erase that.
01:16
Make that one nicer...