The mean age of 5 people in a room is 38 years. A person enters the room. The mean age is now 39. What is the age of the person who entered the room?
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Answer:
total age is = 5× 38 = 190
when new person enters no of people=6
total age = 6× 39 = 234
age of new person = 234-190 = 44
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