ЁЯУв Too many exams? DonтАЩt know which one suits you best? Book Your Free Expert ЁЯСЙ call Now!

    Question

    If average of first 9 numbers is (n тАУ 50) and the sum

    of remaining number is 1620. Find the value of тАШnтАЩ, if the average of 21 numbers is тАШnтАЩ.┬а
    A 97.5 Correct Answer Incorrect Answer
    B 48 Correct Answer Incorrect Answer
    C 139 Correct Answer Incorrect Answer
    D 64.9 Correct Answer Incorrect Answer
    E 108 Correct Answer Incorrect Answer

    Solution

    According to the question, => 21n = 9┬а├Ч┬а(n тАУ 50) + 1620 => 21n - 9n = 1620 тАУ 450 => n = 97.5

    Practice Next
    More Average Questions
    ask-question