0.7 * 400 = 280
She has 86 + 77 + 64 = 227
280 - 227 = 53
An arithmetic student needs at least a 70% average to receive credit for the course. If she scored 86%, 77%, and 64% on the first three exams, what is the lowest score she can get on the fourth exam to receive credit for the course?
1 answer