Can someone help me please

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

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

Ineed with this problem 21 show steps