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    Question

    Average of 10 quantities is 35. If two extra quantities are

    added whose average is 'x', the new average rises by 10%. Find the value of 'x'.
    A 72 Correct Answer Incorrect Answer
    B 56 Correct Answer Incorrect Answer
    C 25 Correct Answer Incorrect Answer
    D 65 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Sum of 10 quantities = 10 × 35 = 350

    New average of all the numbers = 35 × 1.1 = 38.5

    So, sum of 12 numbers = 38.5 × 12 = 462

    So, average of two new numbers = (462 - 350) ÷ 2 = 56

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