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Mathematics, 11.11.2021 06:10 angelteddy033

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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