passwella.
Menu

JAMB Mathematics 2012 Question 43

Question 43

Measures of Central Tendency

The mean of seven numbers is 96. If an eighth number is added, the mean becomes 112. Find the eighth number.

  1. A.126
  2. B.180
  3. C.216
  4. D.224
Show the answer and explanation

Answer: D (224)

Explanation

The seven numbers total 672 and the eight total 896, so the eighth number is 224.