New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    Average of 5 figures is 70. When two more figures are added

    with an average of 'x', the new average increases by 10%. Find the value of 'x'.
    A 72.5 Correct Answer Incorrect Answer
    B 56.1 Correct Answer Incorrect Answer
    C 50.5 Correct Answer Incorrect Answer
    D 94.5 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Sum of 5 figures = 5 × 70 = 350

    New average of all the numbers = 70 × 1.1 = 77

    So, sum of 7 numbers = 77 × 7 = 539

    So, average of two new figures = (539 - 350) ÷ 2 = 94.5

    Practice Next