27
6 boys have a mean age of 10 years.
14 girls have a mean age of 5 years.
Work out th...
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Mathematics, 24.03.2021 14:20 jwdblue
27
6 boys have a mean age of 10 years.
14 girls have a mean age of 5 years.
Work out the mean age of all 20 children.
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Answers: 3
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