11. The average age 16 of 6 students is 11 yr. If two more students of age 14 yr and years join. Find their average age. (a)

Question

11. The average age 16 of 6 students is 11 yr. If
two more students of age 14 yr and years
join. Find their average age.
(a) 12 yr
(b) 38 yr
(c) 14 yr
(d) 15 yr​

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Eloise 1 month 2021-08-12T13:39:59+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-08-12T13:41:08+00:00

    Step-by-step explanation:

    let 6 students ages sum is S.

    average age = S/6 = 16

    => S = 96

    After 2 students more join then,

    average age = (S + 14 + 18)/8 = (16+14+18) / 8 = 6.

    Here Qus. is incomplete because 1 student age is not given, you forget that so I take 1 student age 18. If you have any other then replace it with 18.

    Here you go.Best of Luck

    0
    2021-08-12T13:41:55+00:00

    Answer:

    Option A is Correct answer

    Step-by-step explanation:

    ⇒ The average age of 6 students is 11 years.

    ∴ Sum of age of 6 students =6×11=66

    ⇒ When two more students of age 14 and 16 added to 6 students then, total students will become 8

    ⇒ Sum of age of 8 students =66+14+16=96

    ∴ Required average =

    8

    96

    =12years

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