In a Recent Semester at a Local University, 520 Students

Multiple Choice

In a recent semester at a local university, 520 students enrolled in both General Chemistry and Calculus I. Of these students, 88 received an A in general chemistry, 76 received an A in calculus, and 31 received an A in both general chemistry and calculus.
Find the probability that a randomly chosen student received an A in general chemistry or calculus or both.

A) 0.811
B) 0.375
C) 0.256
D) 0.315