Mr. Doodle’s grade distribution over the past 3 years for a course in college algebra is shown in the chart below.

Question

Grade Number

A 45

B 180

C 110

D 95

F 65

I 5

If Jane plans to take a college algebra course with Mr. Doodle, determine the empirical probability that she receives at least a B.

Answer 1

P = 180 / (45+180+110+95+5) = 180/500 =
9/25 = 0.36.