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JAMB Mathematics 1990 Question 46

Question 46

Data Presentation

4, 16, 30, 20, 10, 14 and 26 are represented on a pie chart. Find the sum of the angles of the sectors representing all numbers equal to or greater than 16

  1. A.48°
  2. B.84°
  3. C.92°
  4. D.276°
Show the answer and explanation

Answer: D (276°)

Explanation

The total is 120. The numbers 16 or more are 16, 30, 20 and 26, which add up to 92. Their angles add up to 92/120 × 360° = 276°.