How do I solve this?

Question

20 children in the cast of a class play8 of the children are boys. Of the boys 4 have speaking parts in the paly of the girls, 8 do. If achild from the cast of the play is chosen at random, what is the probability that the child has a speaking part?

Answer 1

How many children are in the play? 20 total

 

How many have speaking parts? 4 boys, 8 girls, or 12 speaking parts 

 

probability = chances/total = 12/20

                        (simplify the fraction)

                                      3/5