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JAMB Mathematics 1995 Question 44

Question 44

Measures of Dispersion

The mean and the range of the set of numbers 1.20, 1.00, 0.90, 1.40, 0.80, 0.80, 1.20 and 1.10 are m and r respectively. Find m + r.

  1. A.1.11
  2. B.1.65
  3. C.1.85
  4. D.2.45
Show the answer and explanation

Answer: B (1.65)

Explanation

The eight numbers add up to 8.40, so m = 1.05. The range is 1.40 − 0.80 = 0.60. m + r = 1.65.