New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    TYPE R

    Average age of 10 boys is increased by 6 years when two

    of them whose age are 18 and 22 years are replaced by two new members. What is the average age of the new member?
    A 54 Correct Answer Incorrect Answer
    B 34 Correct Answer Incorrect Answer
    C 50 Correct Answer Incorrect Answer
    D 48 Correct Answer Incorrect Answer
    E 61 Correct Answer Incorrect Answer

    Solution

    Let the sum of the age of two new members be ‘a’. Let the initial average age of boys = x After increment the average age of boys = x + 6 According to question, => 10x – 18 – 22 + a = 10(x+6) => a = 100 Average age of the new members = 100/2 = 50

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