00:01
Okay, so we've got a jar that contains three red balls and five white balls.
00:12
And we're picking two.
00:14
Picking two.
00:19
And so for a, we're saying what is the probability that we get two red balls? so then if we're doing two red balls, we're going to choose our first one.
00:29
So we've got the probability of three out of the eight, this first one.
00:36
So this is picking our first ball.
00:39
And so now we have two red balls left.
00:41
Out of seven.
00:42
So we've decreased our sample size and our event size.
00:46
So we've got to match that.
00:47
So now we'll get this three eighths time two seventh, which i'm going to go ahead and simplify this.
00:52
We'll get four, which will leave us with three over 28...