Question

The grade distribution for a course is listed in the following table. If a student is randomly selected fro mly selected from this class, what is the probability that they received an A, B, or C? A B C D F 40 40 33 20 14

Answer 1

the probability that a randomly selected student received an A, B, or C is approximately 0.769, or about 76.9%.

Explanation:

To find the probability that a randomly selected student received an A, B, or C, we need to add up the number of students who received each of these grades and divide by the total number of students in the class.

The total number of students in the class is:

total = A + B + C + D + E = 40 + 40 + 33 + 20 + 14 = 147

The number of students who received an A, B, or C is:

A + B + C = 40 + 40 + 33 = 113

Therefore, the probability that a randomly selected student received an A, B, or C is:

P(A or B or C) = (A + B + C) / total = 113 / 147 ≈ 0.769

So the probability that a randomly selected student received an A, B, or C is approximately 0.769, or about 76.9%.