Mathematics, 10.05.2021 07:50 hrcatena

the average age of 9 boys in a class is 15years, if another boy of age 13years join the class, what is the average age of the 10boys

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the average age of 9 boys in a class is 15years, if another boy of age 13years join the class, what is the average age of the 10boys​

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the average age of 9 boys in a class is 15years, if another boy of age 13years join the class, what is the average age of the 10boys