The grades of 36 students in a class test are as shown in the pie chart above. How many students have excellent?
Attached Figure / Diagram
A
12
B
9
C
8
D
7
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
Excellent = 360^\circ - (120^\circ + 90^\circ + 80^\circ)
= 70^\circ
Number of excellent students = \(\frac{70}{360} \times 36\)
= 7 students
Source: Myschool Past Questions Archive (Record #33166)