On Tuesday, 30 of the students in a class took a test and their average score was 83.5 . On Thursday , the other 5 students took the test, and their average score was 94. what was the average for the entire class?
A
83.5%
B
84.5%
C
85%
D
88.2%
Correct Answer: 85%
Average = 30×83·5 + 5×9430 + 5 = 2505 + 47035 = 85 = 85%