Math
Math, 18.10.2019 10:00, ashiii12

In a class, three are 40 boys and their age is 16 years. one boy, aged 17 years, leaving the class and another joining, the average age becomes 15.875 years. the age of new boy is : ​

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In a class, three are 40 boys and their age is 16 years. one boy, aged 17 years, leaving the class a...

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