John Is Taking Statistics and Biology This Semester

Multiple Choice

John is taking Statistics and Biology this semester. The probability John will get an A in Statistics is 0.4. The probability John will get an A in Biology is 0.3. The probability John will get an A in both Statistics and Biology is 0.15. What is the probability that John will get at least one A between his Statistics and Biology courses?

A) 0.12
B) 0.15
C) 0.55
D) 0.7