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OpenStudy (anonymous):
The mean age of 10 people in a room was 16. When Toby walked into the room, the mean age went up to 18. What is Toby's age? A. 18 B. 20 C. 22 D. 34 E. 38
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OpenStudy (anonymous):
Well if there are 10 people and their average age is 16..what is the total years for all ten people?
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