## Alia is 9 years old than her twin brothers. If they are x years old, find the mean age of the three children in simplest terms

Question

Alia is 9 years old than her twin brothers. If they are x years old, find the mean age of the three children in simplest terms

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1 month 2021-08-12T07:43:40+00:00 2 Answers 0 views 0

1. ### ❄ Given ❄

Alia is 9 years older than her twin brothers.

### ❄ To Find ❄

The mean age of the three children in simplest terms if they are x years old.

### ❄ Solution ❄

According to the question,

► Age of Alia’s twin brothers = x years

► Alia’s age = (9 + x) years

We know, Substituting values :- 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.

2. ### Given :

• Alia is 9 years old than her twin brothers (9 + x)
• If they are x years old ( x )

### To find :

• mean age of the three children in simplest terms

### solution :

Mean = sum of observation/Number of observation …..(formula)

=> (9 + x + x + x)/ 3

=> (9 + 3x)/3

=> 3(3 + x)/3

=> 3 + x

=> Answer is 3 + x years