Question

The average age of four girls in 15 year .find the sum of thier ages

Answer 1

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Answer 2

Given: The average age of four girls is $15$year.

We have to find the sum of ages of girls.

As we know that the average of a set of numbers is simply the sum of the numbers divided by the total number of values in the set.

We are solving in the following way:

We have an average age of four girls is $15$year.

Let assume the sum of their ages will be $x.$

Therefore,

$\\\\=>15=\frac{x}{4} \\\\=>15\times 4=x$

Solving the above equation further we get,

$x=60$

Hence, the sum of their ages will be$60.$