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

    Question

    Average of thirteen consecutive numbers is 56. Find the

    sum of smallest and largest number.
    A 108 Correct Answer Incorrect Answer
    B 110 Correct Answer Incorrect Answer
    C 112 Correct Answer Incorrect Answer
    D 114 Correct Answer Incorrect Answer

    Solution

    Let the numbers be (a - 6), (a - 5), (a - 4), (a - 3), (a - 2), (a - 1), a, (a + 1), (a + 2), (a + 3), (a + 4), (a + 5) and (a + 6).
    So, (a - 6 + a - 5 + a - 4 + a - 3 + a - 2 + a - 1 + a + a + 1 + a + 2 + a + 3 + a + 4 + a + 5 + a + 6) ÷ 13 = 56
    Or, (13a/13) = 56
    Or, 'a' = 56
    Required sum = a - 6 + a + 6 = 2a = 2 × 56 = 112

    Practice Next
    More Average Questions

    Relevant for Exams:

    ask-question