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    Question

    The average age of 19 girls is 45 years. If the age of

    one more girl is added the average decreases by half a year. What is the age of new girl?
    A 28 Correct Answer Incorrect Answer
    B 33 Correct Answer Incorrect Answer
    C 35 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Total age of 19 girls = 19 times; 45 = 855 years If the age of one more girl is added the average decreases by half a year, there4; Total age of 20 girls = 44.5 times; 20 = 890 Now, the age of new girl = 890 ndash; 855 = 35 years

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