Mathematics, 06.05.2020 23:57 shotocaffe

The mean age of 5 people in a room is 28 years. A person enters the room. The mean age is now 29. What is the age of the person who entered the room?

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The mean age of 5 people in a room is 28 years. A person enters the room. The mean age is now 29. Wh...