Mathematics, 21.04.2021 14:00 alisharodriguez1

The mean age of 5 people in a room is 39 years. A person enters the room.
The mean age is now 40.
What is the age of the person who entered the room?

Answers: 3

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The mean age of 5 people in a room is 39 years. A person enters the room.
The mean age is...