Answer: It is A
Step-by-step explanation: Just did it on edg2020
well, in short, the students and chaperones are at a 2 : 9 ratio, and we know there are 171 students, how many chaperones then, so long they maintain a 2:9 ratio?

No solution because everything cancels out
Ans57 , 58 , 59
Step-by-step explanation: