Multiple choice

Average age of 5 boys is 14 years. Average 3 other is 19 years. Find the average age of all 8 boys?

  1. 15.875

  2. 11.36

  3. 147.36

  4. 136.36

  5. 14.25
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A Correct answer
Explanation

Total age = (5 * 14) + (3 * 19) = 70 + 57 = 127. Average = 127 / 8 = 15.875.

AI explanation

Using the weighted average method, the total age of the first 5 boys is 5 times 14, which equals 70 years, and the total age of the 3 other boys is 3 times 19, which equals 57 years. The combined total age for all 8 boys is 70 plus 57, giving 127 years. The average age of all 8 boys is 127 divided by 8, which equals 15.875 years.

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