The pie chart shows the examination grades obtained by a group of students. Which of the following statements about the pie chart is true?
A
15% of the students scored grade B
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B
90% of the students scored grade A
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C
14 of the students scored grade B
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D
13 of the students scored grade C
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Solution
The correct option is D13 of the students scored grade C Since the total angle at the centre of a circle is 360o angle for C is 360o−90o−150o=120o Since 120o=13×360o, the correct answer is 13 of the students scored grade C.