📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    A class of 20 students has an average age of 19 years. 5

    new students join and the average becomes 17.5 years. Find the average age of the new students.
    A 10.5 years Correct Answer Incorrect Answer
    B 11.5 years Correct Answer Incorrect Answer
    C 12.5 years Correct Answer Incorrect Answer
    D 13.5 years Correct Answer Incorrect Answer
    E 14.5 years Correct Answer Incorrect Answer

    Solution

    Initial sum = 20 × 19 = 380 years
    New average = 17.5
    New total = 25
    New sum = 25 × 17.5 = 437.5 years
    Sum of new = 437.5 - 380 = 57.5 years
    Average = 57.5 ÷ 5 = 11.5 years

    Practice Next
    More Average Questions

    Relevant for Exams:

    ask-question