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Mathematics, 28.01.2020 22:11 Garry123

8. the average age of 3 boys is 15 yrs. but if one is not considered,
average age will be 20 yrs. what is the age of expelled one?

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8. the average age of 3 boys is 15 yrs. but if one is not considered,
average age will be 20 yr...

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