Write a problem that can be solved by using equal groups

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

What are the soultion(s) to the quadratic equation 40- x^2=0

Iwill give you ! what is the measure of ∠v ?