Question

In a course where all the marks are awarded out of 100. Alex received a 70 on his essay and a 90 on his final exam. He got an 80 for class participation. The essay counts as %30 of his total grade and class participation count as %20. What is his total grade?

Please help and explain in details
Many thanks

Answer 1

just multiply each weight by its grade.
0.30*70 + .20*80 + ?*90
so, what do you think ? (the weight of the final) is?

Answer 2

0.30*70 + .20*80 + 0.50*90 = 82 is his total grade?