Here is the representation of a histogram. This represents in a continuous distribution the probability frequency of the books that Pedro had read in the summer.
The area is 120/(1/4) or 120 x 4 or 480 square inches the width is 6/(1/2) or 6 x 2 or 12 inches to find the length, divide the area by the width 480/12= 40 40 inches Hope this helps :)
