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    Question

    The average age of 30 children and their teacher's age

    are 25 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?
    A 55 years Correct Answer Incorrect Answer
    B 52 years Correct Answer Incorrect Answer
    C 50 years Correct Answer Incorrect Answer
    D 60 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Sum of the age of total children and teacher = 31 × 25 = 775 Sum of the age of children after excluding = 30 × 24 = 720 Teacher’s age = 775 – 720 = 55 years

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