Question 18 of 36 1 Points Dr. Grey teaches General Surgery, and she is interested in measuring her students' knowledge of the subject. In order to do so, she gave the same 50- item test to all four of her classes. Use this information to answer items 16-20. Class A Class B Class C Class D n 30 25 30 20 mean 31.5 30 43 22 median 31 25 45 25 mode 30 20 47 . 30 Imagine that Dr. Grey forgot to grade the last page of all students' tests in Class A; thus, the information above for Class A would potentially be incorrect. If every student earned 5 points for that last page, and she added 5 points to each student's score, what would be the mean of the corrected scores in Class A? A. 36.5 O B. 26.5 O C. not enough information given O D. 31.5