The grades of 36 students in a test are shown in the pie chart above….

The grades of 36 students in a test are shown in the pie chart above. How many students had excellent?

Correct Answer: Option A

Explanation

Angle of Excellent
= 360 – (120+80+90)
= 360 – 290
= 70^o
If 360^o represents 36 students
1^o will represent ³⁶/₃₆₀
50^o will represent ³⁶/₃₆₀ * ⁷⁰/₁
= 7