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JAMB Economics 2001 Question 13

Question 13

Tools of Economic Analysis

If the arithmetic mean of 1, 2, 5, 6, x, 16 and 18 is 8.0, find the value of x.

  1. A.7.0
  2. B.6.0
  3. C.8.5
  4. D.8.0
Show the answer and explanation

Answer: D (8.0)

Explanation

Seven numbers with mean 8 add up to 56. The known numbers add up to 48, so x = 56 − 48 = 8.