Question

The average age of six boys is 12 years

average age of 4 boys is
18 years
find the average age
of all ten boys​

Answer 1

14.4

Explanation:

The total of their ages is effectively ...

12 +12 +12 +12 +12 +12 +18 +18 +18 +18 = 144

So, the average age of the 10 boys is that sum divided by the number of boys, 10.

144/10 = 14.4