You will be required to answer them in 1 hour and 45 minutes, which is a rate of fewer than 2 ½ minutes per question. The scores for the AP® Calculus AB exam are calculated based on the breakdown in this chart: The multiple-choice portion of the AP® Calculus AB exam consists of 45 questions.Download a PDF version of the 2022 score distributions. The score distribution tables on this page show the percentages of 1s, 2s, 3s, 4s, and 5s for each AP subject. Ap calculus score calculator Example AP Exam Question: Suppose that the rate of water flow is approximated by R ( t) = 0.03 ( 760 + 30 x – 4 x2), where R ( t) is measured in gallons per hour and t is …AP Calculus AB students demonstrated strongest mastery of Unit 4, Contextual Applications of Differentiation, with 11% of students earning a perfect score across the questions about this …AP Score Distributions See how all AP students performed on the most recent exams.