Mathematics, 24.11.2020 01:50 karolmolina49

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

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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 now 40. Wh...

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