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Mathematics, 30.09.2019 21:00 mtunes

The average age of 4 children is 8
the average of 3 of them is 7
what she is the age of the 4th child


The average age of 4 children is 8  the average of 3 of them is 7 what she is the age of

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The average age of 4 children is 8
the average of 3 of them is 7
what she is the age of...

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