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UI Post-UTME Mathematics 2018 (Model questions) Question 21

Question 21

Measures of Central Tendency

The mean of marks scored by 3 students in a test is 9. If the modal mark is 11, find the lowest mark

  1. A.6
  2. B.5
  3. C.7
  4. D.8
Show the answer and explanation

Answer: B (5)

Explanation

The total is 27; the mode 11 must appear twice (22), so the lowest mark is 27 − 22 = 5.