In a group of 40 students, 23 take the ap psychology class, 18 take the ap calculus class, and 8 take both classes. what is the probability that a student takes ap psychology or ap calculus?

Step-by-step explanation:

This is a Venn Diagram problem.

23 - 8 = 15 take just AP Psychology

18 - 8 = 10 take just AP Calculus

I think this question is likely done by adding all three areas together to get 33

15 + 10 + 8

33

The probability is therefore 33/40 = 0.825