maths homework average 11th question
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Answer:
17 years 3 months
Step-by-step explanation:
The Age of tenth child = (Sum of ages of 10 children) - (Sum of ages of 9 children)
= (9 years 9 months) * 10 - (8 years 11 months) * 9
= 97 years 6 months - 80 years 3 months
= 17 years 3 months.
Therefore, the age of tenth child = 17 years 3 months.
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