Mathematics, 26.07.2021 21:10, amuijakobp78deg

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?

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