An Economics Lecturer Bases His Final Grade on Tutorial Work,two

Multiple Choice

An economics lecturer bases his final grade on tutorial work,two mid-semester tests,and a final examination.The tutorial work counts 10% toward the final grade,while each mid-semester test counts 25%.The remaining portion consists of the final examination.If a student scored 95% in tutorial work,70% on the first mid-semester test,96% on the second mid-semester test,and 72% on the final exam,his final average would be _________.

A) 78.9%
B) 89.7%
C) 79.8%
D) 87.9%