Math problem on sum average

Question

In your first semester of geometry, you get a 78 & 86 on two quizzes, and a 96 on the test. The test is worth twice as much towards your final average as each quiz. What is your final grade in geometry?

Answer 1

89= final grade

(78+86+96+96)/4 = 164+192)/4= 356/4= 89