AP tests: Advanced Placement (AP) tests are graded on a scale of 1 (low)

through 5 (high). The College Board reported that the distribution of scores on the AP Statistics Exam in a recent year was as follows:

A score of 3 or higher is generally required for college credit. What is the probability that a student scores 3 or higher?

I 1 2 3 4 5 P(x) 0.34 0.25 0.18 0.16 0.07