Mathematics, 06.10.2019 11:00, sam9043

There are 20 children at a library. six of the children have an average age of 5 years. the remaining children have an average age of 8 years. what is the average age of the children at the library? enter your answer in the box.

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There are 20 children at a library. six of the children have an average age of 5 years. the remainin...

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