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    Question

    ┬аThe average age of 12 boys in a group is 8 years. If

    3 more boys join the group, the average is increased by 1 year. What is the average age (in years) of the three new boys in the group?
    A 10 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 13 Correct Answer Incorrect Answer
    D 9 Correct Answer Incorrect Answer

    Solution

    The┬а average age of 12 boys in a group=8 years Total Age =12├Ч8=96 years┬а 3 more boys join the group so the total boys =12+3=15 boys┬а And increased average by 1=8+1=9 years So total age of 15 boys =15├Ч9 =135 years total age of new 3 boys =135-96=39 years average age of new 3 boys = 39/3=13 years┬а┬а

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