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Mathematics, 04.03.2021 23:20 kalibaby

There are 25 children at a birthday party The mean age of the 25 children is 6 years.
16 of the 25 children are boys.
The mean age of the boys is 5.5 years.
Work out the mean age of the girls. Give your answer to 1 decimal place.

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There are 25 children at a birthday party The mean age of the 25 children is 6 years.
16 of t...
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