Billy is playing in his sandbox. He enjoys burying his toys in the sand. He has 3
dump trucks, 2 tractors, and 2 pickup trucks. Billy randomly selects a toy, buries it,
then chooses another. What is the probability that the first toy he picks is a tractor
and so is the second?
the probability of Billy getting a tractor is 2:7 because you have to add up all the toys in total and whatever you want to find the ratio of that is your answer.