Task: Question Answering
Input (English): Problem: if 63 percent of a class answered the first question on a certain test correctly, 50 percent answered the second question on the test correctly, and 20 percent answered neither of the questions correctly, what percent answered both correctly ?
Options: a. 24 %, b. 27 %, c. 30 %, d. 33 %, e. 36 %
Output (English): d