The grades of 36 students in a class test are as shown in the pie chart. How many student has excellent?
Attached Figure / Diagram
A
7
B
8
C
9
D
12
Verified Correct Answer: A.
Step-by-Step Mathematical Solution
degree of excellent in the pie-chart = 360o - (90o + 120o + 80o) = 360o - 290o = 70o
= 360o = 36 students
70 = \(\frac{70^o}{360^o}\) x 36 = 7
Source: Myschool Past Questions Archive (Record #33090)