The following are the ages (years) of 5 people in a room: 12 , 22 , 21 , 13 , 14 A person enters the room. The mean age of the 6 people is now 21. What is the age of the person who entered the room?
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answer: 22. because it says 5 people in the room so 12 make it 21. 13 make it 21. 14 make it 21 so there is only one number left and that is 22.
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