Question is in the picture

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

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

Math it's appreciated. (picture provided)