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Solve this:

Q3. The ages of 10 children who joined the skating camp were 6 years, 6 years, 9 years, 8 years, 7 years 11 years, 9 years, 7 years, 10 years, 8 years. Find the average age.

$\text{Averageage=}\frac{\mathrm{Sum}\mathrm{of}\mathrm{ages}}{\mathrm{Total}\mathrm{number}\mathrm{of}\mathrm{students}}\phantom{\rule{0ex}{0ex}}=\frac{6+6+9+8+7+11+9+7+10+8}{10}\phantom{\rule{0ex}{0ex}}=\frac{81}{10}\phantom{\rule{0ex}{0ex}}=8.1$

Regards

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