Question 64

The average age of 5 children is 10 years. If two more children of ages 11 years and 16 years join, then what will be the new average age?

Solution

The average age of 5 children is 10 years.

Sum of the ages of 5 children = $$10\times5$$ = 50

If two more children of ages 11 years and 16 years join, then New average age = $$\frac{50+11+16}{5+2}$$

= $$\frac{77}{7}$$

= 11 years

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