Task: Question Answering
Input (English): Problem: a group of boy scouts and girls scouts is going on a rafting trip . 60 % of the scouts arrived with signed permission slips . if 45 % of the scouts were boy scouts and 50 % 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 ) 64 , b ) 68 , c ) 72 , d ) 76 , e ) 80
Output (English): b