00:03
All right, for part a, we're told that the ratio of boys to girls is four to three.
00:09
That means that there are four boys for every three girls, and it asks, what is the ratio of girls to total students? well, that ratio would be three, because that's the girls, two, or we could use the colon there, and then the total number of students.
00:25
Well, if the ratio is in four to three, that means if there are three girls, there are four boys.
00:30
So that would be a total of seven students altogether.
00:33
We add those two to get the number of students.
00:38
Now, this doesn't matter whether, you know, there happens to actually be only seven students or if there were actually six girls, that would mean that there would have to be eight boys.
00:49
All right.
00:49
So it would be six and eight.
00:50
That would be 14.
00:51
And six to 14 would also reduce down to three to seven.
00:55
That's why it's okay to just use those probabilities.
00:57
From part b, it's kind of the same thing.
01:00
Boys to girls is m to n, so it's the same basic setup here.
01:03
What is the ratio of girls to students? well, you know, the three was the girls number, so that's why i started with three in part a.
01:12
So n is the girl's number for this one...