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    Question

    What approximate value will come in place of the question mark (?) in the following question?(Note: You are not expected to calculate the exact value.)

    49.99% of 639.99 + 159.98% of 49.99 =

    ?2
    A 42 Correct Answer Incorrect Answer
    B 10 Correct Answer Incorrect Answer
    C 60 Correct Answer Incorrect Answer
    D 20 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, 49.99% of 639.99 + 159.98% of 49.99 = ?2 ?2 = 50% × 640 + 160% × 50 ?2 ~ 320 + 80 ?2 ~ 400 ? ~ √400 ? ~ 20

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