Task: Question Answering
Input (English): Problem: a group of boy scouts and girls scouts is going on a rafting trip. 70 % of the scouts arrived with signed permission slips. if 60 % of the scouts were boy scouts and 75 % of the boy scouts arrived with signed permission slips, then what percentage of the girl scouts arrived with signed permission slips ? round to the nearest percent.
Options: a. 50 %, b. 60 %, c. 63 %, d. 66 %, e. 70 %
Output (English): c