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    Question

    A Student was asked to add 8 and subtract 5 from a

    number. By mistake, he added 5 and subtracted 8. If his answer is 11, what should be the correct answer?
    A 17 Correct Answer Incorrect Answer
    B 18 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 22 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the number be x And the correct answer be y According to the question  x + 8 – 5 = y x + 3 = y ...................(i) Again,  x + 5 – 8 = 11 x = 14 Put the value of x in (i) We get, 14 + 3 = y y = 17

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