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    Question

    The average age of 14 girls is 42 years. If the age of

    two more girl is added the average decreases by one and a half year. What is the sum of the age of new girls?
    A 78 Correct Answer Incorrect Answer
    B 66 Correct Answer Incorrect Answer
    C 45 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer

    Solution

    Total age of 14 girls = 42 x 14 = 588 years If the age of two more girl is added the average decreases by one and a half year, Total age of 16 girls = 40.5 x 16 = 648 Now, sum of the age of new girls = 648 - 588 = 60 years

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