A pediatrician tested the cholesterol levels of several young patients. The following relative-frequency histogram shows the readings for some patients who had high cholesterol levels.
a. What percentage of patients have cholesterol levels between 205 and 209, inclusive?
15%
b. What percentage of patients have levels of 215 or higher?
35%
c. If the number of patients is 20, how many have levels between 210 and 214, inclusive?
patients
Use the graph to answer the following questions. Note that cholesterol levels are always expressed as whole numbers.