Math MCQ: The average age of four boys, five years ago was 9 year. on including a new boy, the present average age of all the five is 15 years. The present age of the new boy is

The average age of four boys, five years ago was 9 year. on including a new boy, the present average age of all the five is 15 years. The present age of the new boy is

Correct Answer: 19 years

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