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WAEC Mathematics 1991 (August) Question 34

Question 34

Measures of Central Tendency

The mean of 30 observations recorded in an experiment is 5. If the observed largest value of 34 is deleted, find the mean of the remaining obsvervations

  1. A.5
  2. B.4
  3. C.3.9
  4. D.3.4
  5. E.3.0
Show the answer and explanation

Answer: B (4)

Explanation

Total = 30 × 5 = 150. Remove 34: 116 ÷ 29 = 4.