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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.)

    70.008% of 399.98 + ?% of 399.999 = 80.105% of

    599.998
    A 90 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 16 Correct Answer Incorrect Answer
    D 50 Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    ATQ, 70.008% of 399.98 + ?% of 399.999 = 80.105% of 599.998 Or, 70% of 400 + ?% of 400 ~ 80% of 600 Or, 0.7 × 400 + (?/100) X 400 ~ 0.8 X 600 Or, 280 + ? × 4 ~ 480 Or, ? × 4 ~ 480 - 280 Or, ? ~ (200/4) So, ? ~ 50

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