Please answer the question in the middle ASAP!!

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

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

For each proportion find the unknown number x 1/5/8=×/15