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

    Question

    A set contains ten numbers. The average of the first

    six numbers is (x − 4), and the average of the last three numbers is (x + 2). The average of the entire set is 'x'. If the 7th number of the set is 40, then find the value of 'x'.
    A 24 Correct Answer Incorrect Answer
    B 22 Correct Answer Incorrect Answer
    C 26 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer
    E 28 Correct Answer Incorrect Answer

    Solution

    Sum of the numbers of set = 10x Sum of first 6 numbers = 6(x − 4) = 6x − 24 Sum of last 3 numbers = 3(x + 2) = 3x + 6 ATP, 6x − 24 + 40 + 3x + 6 = 10x 9x + 22 = 10x x = 22

    Practice Next
    More Average Questions

    Relevant for Exams:

    ask-question