Bah bah black sheep have you any wool yes sir yes sir three bags full
If that is -2+1+4+13 I think it should be 16
I don’t know, I forgot how to solve problems like this, look it up
1. YX = 8√3/tan60° = 8
so ZX = ZY + YX = 10 + 8 = 18
2. angle Q
Probability of having a girl: 1/2
Probability of having another girl right after: 1/2
Probability of having a boy right after: 1/2
Then another boy: 1/2
And a third boy: 1/2
To find compound probabilities, just multiply them together.