New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    The average age of 16 girls is 35 years. If the age of

    two more girls is added the average decreases by 3.5 years. What is the sum of the age of new girls?
    A 9 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 10 Correct Answer Incorrect Answer
    D 7 Correct Answer Incorrect Answer
    E 13 Correct Answer Incorrect Answer

    Solution

    Total age of 16 girls = 16 × 35 = 560 years   If the age of two more girls is added the average decreases by 3.5 years,   ∴ Total age of 18 girls = 31.5 × 18 = 567 Now, the sum of the age of new girls = 567 – 560 = 7 years

    Practice Next