Q156: A group of 20 students boarded your school bus. At Point | Riddles Repository

Q156: A group of 20 students boarded your school bus. At Point A, 5 students got down and 3 more boarded. At Point B, 10 got down and 7 more boarded. At Point C, 5 got down and 7 more boarded. Who is the driver? @RiddlesRepository