00:01
So for this problem, for writing down the sample space, i find it's most useful to have some sort of system or systematic plan for how you're going to go through the different possibilities.
00:11
So the way that i'll do this is for the first row, this will be the one boy, or actually let's say first row is the zero boys, then we'll have a one boy row, a two boy row, and a three boy row.
00:32
So, let me move that a little bit more out of the way.
00:38
So, if there are three kids, then we have that there's one way to have zero boys, that's if all three of the children are girls.
00:51
Actually, what i'll do is for a single event, i'll just sort of put the letters right next to each other, so we'd have ggg as the first possible outcome, then bgg, gbg, or ggb.
01:08
When we have one boy, we can think of it as the b starts at the left and then moves from left to right...