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18 August, 11:19

The following are the ages (years) of 5 people in a room: 23, 15, 17,23, 23 A person enters the room. The mean age of the 6 people is now 19. What is the age of the person who entered the room?

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  1. 18 August, 11:22
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    13 years

    Step-by-step explanation:

    17 + 15 + 23 + 23 + 23 = 101 / 5 = 20.2

    Mean before was 20.2

    In order for the mean to be 19, all those numbers would have to add up 114 to be divided by 6 and have a mean of 19

    114 / 6 = 19

    114-101 = 13 is that number

    17 + 15 + 23 + 23 + 23 + 13 = 114 / 6 = 19
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