2013
Mathematics
67ca00ce0c643c71d77dee1f
The pie chart above shows the statistical distribution of 80 students in five subjects in an examination. Calculate how many student offer Mathematics.
A.
30
B.
11
C.
50
D.
20
Correct Answer: 11
Explanation
5x° + (16x - 24)° + 5x° + (4x + 12)° + (6x + 12)° = 360° 36x° - 24 + 12 + 12 = 360° 36x° = 360° x° = 360°/36 = 10° Thus, the angle of sector representing Mathematics is 5 x 10° = 50°. Hence the number of students who offer mathematics is 50/(360) × 80 ≈ 11
5x° + (16x - 24)° + 5x° + (4x + 12)° + (6x + 12)° = 360° 36x° - 24 + 12 + 12 = 360° 36x° = 360° x° = 360°/36 = 10° Thus, the angle of sector representing Mathematics is 5 x 10° = 50°. Hence the number of students who offer mathematics is 50/(360) × 80 ≈ 11THIS WEEK's
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