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The grades of 36 students in a test are shown i... - JAMB Mathematics 2005 Question

The grades of 36 students in a test are shown in the pie chart above. How many students had excellent?
A
7
B
8
C
9
D
12
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Correct Option: A

Angle of Excellent

= 360 - (120+80+90)

= 360 - 290

= 70o

If 360o represents 36 students

1o will represent 36/360

50o will represent 36/360 * 70/1

= 7

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