The following are the ages (years) of 5 people in a room: 13, 13, 19, 23,19 A person enters the room. The mean age of the

Question

The following are the ages (years) of 5 people in a room:
13, 13, 19, 23,19
A person enters the room.
The mean age of the 6 people is now 21.
What is the age of the person who entered the room?

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Nem 4 years 2021-07-17T20:02:25+00:00 2 Answers 54 views 0

Answers ( )

  1. thachthao
    0
    2021-07-17T20:03:31+00:00
    Reply

    Answer:Answer:

    the added person age is 26

    Step-by-step explanation:

    let the added person age is A

    the six person mean is (23+19+12+21+13+A)/6=19

    => 88+A/6=19

    =>A=(19×6)-88

    there fore A=26

  2. mit
    0
    2021-07-17T20:04:12+00:00
    Reply

    Answer:

    39

    Step-by-step explanation:

    13 + 13 + 19 + 23 + 19 + x = 21

                           6

    Combine like terms

    (87 + x) / 6 = 21                  Multiply both sides by 6

    (87 + x )  = 21 * 6

    87 + x = 126                       Subtract 87 from both sides

    x = 126 – 87

    x = 39

    The 6th person entering the room was 39

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