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JAMB Mathematics 1989 Question 49

Question 49

Measures of Central Tendency

If n is the median and m is the mode of the following set of numbers, 2, 4,2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is

  1. A.(2.6, 2.6)
  2. B.(2.5, 2.6)
  3. C.(2.6, 2.5)
  4. D.(2.5, 2.1)
Show the answer and explanation

Answer: A ((2.6, 2.6))

Explanation

In order the nine numbers are 1.6, 2, 2.1, 2.1, 2.6, 2.6, 2.6, 3.7, 4. The middle (5th) one is 2.6 and the most common is 2.6, so (n, m) = (2.6, 2.6).