Wei-Jen can run 8 miles in one day while training for a long distance race. This year, the average number of days Wei-Jen ran each month was 20 days. Which of the following questions can be answered on the basis of these facts?

The California Basic Educational Skills Test (CBEST) is a standardized test administered in the state of California.

CBEST Mathematics test contains 50 multiple-choice questions which require candidates to solve problems from three major areas: Estimation, Measurement, and Statistical Principles; Computation and Problem Solving; and Numerical and Graphic Relationships.