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6 September, 21:25

The following are the ages (years) of 5 people in a room:

13, 22, 13, 18, 14

A person enters the room.

The mean age of the 6 people is now 23.

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

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Answers (1)
  1. 6 September, 21:52
    0
    58

    Step-by-step explanation:

    the mean is adding up all the numbers, then dividing by the amount of the numbers.

    add up all the numbers:

    13 + 13 + 14 + 18 + 22 = 80

    the mean is 23.

    so you need to back track:

    23 * 6 = 138

    138 - 80 = 58
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