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14 July, 13:21

The mean age of 5 people in a room is 28 years.

A person enters the room.

The mean age is now 32.

What is the age of the person who entered the room?

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  1. 14 July, 15:07
    0
    52 years

    Step-by-step explanation:

    Since the mean age of 5 people in that room is 28 years,

    ∴ Sum₍₅₎ = (28*5) years

    = 140 years

    Then, one person enters the room which makes the mean age 32 years.

    ∴Sum₍₆₎ = (32*6) years

    = 192 years

    ∴The age of the person who enters the room = (192 - 140) years

    = 52 years
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