A professor records the grades for his class of students.He finds that the probability that a student earns an A is p = .14;earns a B is p = .36;earns a C is p = .32;earns a D is p = .10;and earns an F is p = .08.What is the probability that a student earns a B or better in this class?
A).36
B).14
C).86
D).50

Question

Quizplus · Accepted Answer

The probability of earning a B or better (A or B) is the sum of the probabilities of earning an A or a B: 0.14 + 0.36 = 0.50.

A Professor Records the Grades for His Class of Students