In a class of 120 students, 18 of them scored an A grade in mathematics. If the section representing the A grade students on a pie chart has angle Zo at the centre of the circle, what is Z?
A
15
B
27
C
50
D
52
E
54
Verified Correct Answer: E.
Step-by-Step Mathematical Solution
Total students = 120
grade = 18
Zo = \(\frac{18}{120}\) x \(\frac{360}{1}\)
= 54o
Source: Myschool Past Questions Archive (Record #32287)