Question

In a class of 28 students, 12 earned an A on the final exam, 6 earned a B, 4 earned a C, and the remaining students failed. Based on these results, what is the experimental probability that a student will not earn an A or a B?

Answer 1

5/14 ≈ 35.7%

Explanation:

(12 +6) = 18 of the 28 students earned an A or a B. So, the experimental probability that a student did not earn that grade is ...

p(<B) = (28 -18)/28 = 10/28

p(<B) = 5/14 ≈ 35.7%