New SIDBI Grade A New Batch Starts on Nov 18

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    Question

    The average age of 32 children and their teacher's age are 28 years. If the teacher's age is excluded, the average reduces by 1. What is the teacher's age?

    A 42 years Correct Answer Incorrect Answer
    B 38 years Correct Answer Incorrect Answer
    C 60 years Correct Answer Incorrect Answer
    D 55 years Correct Answer Incorrect Answer
    E 45 years Correct Answer Incorrect Answer

    Solution

    sum of the age of total children = 33 ×28 = 924 Sum of the age of children after excluding teacher = 32 ×27 = 864 Teacher’s age = 924 – 864 = 60 years

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