Students who take an AP Calculus exam can take either the AP Calculus AB exam or the more advanced AP Calculus BC exam. On each exam the highest possible grade is a 5 and the lowest is a 1. No student takes both exams. The approximate results (in thousands) for 2011 are summarized in the table below. (For example, the table tells us that 39,000 students took the AB exam and got a 5.) 5 4 3 2 Total AB 39 32 35 23 65 194 BC 28 10 12 4 Total