Question

Alia age is 9 years old than her twin brothers if they are x years old find their mean age of three children

Answer 1

Answer:

3÷9=3

Step-by-step explanation:

the twin brother is 9 years old

then the age three children is 3÷9=3

Answer 2

Alia is 9 years older than her twin brothers.

Given:

• Alia age is 9 years old than her twin brothers.
• Twin Brothers - x years old.

To Find :

The mean age of the three children, if they are x years old.

Solution :

ATQ,

• Age of Alia's twin brothers = x years
• Alia's age = (9 + x) years.

We know that :

$\bigstar\;\boxed{\sf{Mean=\frac{Sum\ of\ observations}{No.\ of\ observations}}}$

So,

⟼ Mean age = (9 + x + x + x) / 3

⟼ Mean age = (9 + 3x) / 3

⟼ Mean age = 3(3 + x) / 3

⟼ Mean age = (3 + x) years

Therefore, the mean age of the three children in simplest terms is 3 + x years.