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Anu is late to a meeting in progress. After she joins the room, the average age of all people in the room increases.....

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Anu is late to a meeting in progress. After she joins the room, the average age of all people in the room increases by exactly 4 years. A few minutes later her twin sister Bhanu joins the meeting and the average age of all people in the room increases again by exactly 3 years.
How many people were in the room before Anu entered?

posted Sep 29, 2023 by Nimish

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