At a certain high school, the respective weights for the following subjects are Mathematics 3, English 3, History 2, Science 2 and Art 1. What is a student’s average whose marks were the following: Geometry 89, American Literature 92, American History 94, Biology 81, and Sculpture 85?

Choices:
85.7
87.8
88.9
89.4
90.2

How do I have to approach the above problem/explanation?

Thanks in advance,

S Vijay