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Mathematics 13 Online
OpenStudy (anonymous):

11. Aloysius and Ebenezer are the only two people in a room. The average weight of these two people is 160 pounds. Now Andrea walks into the room. Andrea weighs 100 pounds. What is the average weight of the three people who are now in the room?

OpenStudy (anonymous):

we had 320 before so now we have 420. Divided by 3

OpenStudy (anonymous):

...so 140

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