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The grades of 36 students in a class test are as shown in the pie...

Mathematics
JAMB 1999

The grades of 36 students in a class test are as shown in the pie chart. How many student has excellent?

  • A. 7
  • B. 8
  • C. 9
  • D. 12
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Correct Answer: Option A
Explanation

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

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