the avarage Age of 12 boys is 10 years. if the average of 11 boys is 9 years what will be age of 12th boy​

Question

the avarage Age of 12 boys is 10 years. if the average of 11 boys is 9 years what will be age of 12th boy​

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Anna 2 months 2021-12-03T09:01:16+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-12-03T09:02:19+00:00

    Answer:

    21 yrs

    Step-by-step explanation:

    Given, Mean of age of 12 boys = 10

    (Sum of ages of 12 boys)/12 = 10

    Sum of ages of 12 boys=120⇒eq.1

    Similarly,

    Sum of ages of 11 boys / 11 = 9

    Sum of ages of 11 boys =99

    Age of 12th boy = Sum of ages of 12 boys – Sum of ages of 11 boys

                              = 120 – 99

                             = 21

    0
    2021-12-03T09:02:37+00:00

    Answer:

    Hí friends,

    Good morning and Happy Rakshabandhan

    answer of your question is 21.

    Step-by-step explanation:

    If the average age of 12 boys is 10 then addition of their age is 120.

    if the average age of 11 boys is 9 then addition of their age is 99

    then the age of 12 th boy is 120-99= 21 .

    Thank you.

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