Two brands of paint—Durable and Forever—are each sold by the gallon in three different grades: good, better, and best quality.
The sales manager at a hardware store tracks all the paint sales.
She started making a table, but did not finish it.
Good Better Best
Durable 48 45 35
Forever 39 33
The experimental probability that the next gallon of paint sold will be
better-quality Durable paint is 9
50 .
a. How many gallons of good-quality Forever were sold?

b. What is the experimental probability that the next gallon of paint
sold will not be the best quality paint?