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

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    0
    2021-08-12T07:45:00+00:00

    ❄ 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,

    \boxed{\sf{\dag\ Mean=\frac{Sum\ of\ observations}{No.\ of\ observations}}}

    Substituting values :-

    \longmapsto Mean age = (9 + x + x + x) / 3

    \longmapsto Mean age = (9 + 3x) / 3

    \longmapsto Mean age = 3(3 + x) / 3

    \longmapsto Mean age = (3 + x) years

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

    0
    2021-08-12T07:45:27+00:00

    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

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