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    Question

    In each of these questions, one question is given followed by by data in three statements I, II and III. You have to study the question and data in the statements and decide that the question can be answered with the data given in which of the statements and mark your answer accordingly.  

    How many students passed in first class? I.

    75% of the students who appeared in the examination have passed in first or second or third class. II. 800 students have passed in third class. III. The number of students who passed in second class is 60% of that in third class and the number of students who passed in first class is 55% of that in second class. 
    A Only II and III Correct Answer Incorrect Answer
    B Only I and II Correct Answer Incorrect Answer
    C Only I and III Correct Answer Incorrect Answer
    D Only III Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    From II and III The number of students who passed in third class = 800 The number of students who passed in second class = 800 × 60/100 = 480 The number of students who passed in first class = 480 × 55/100 = 264 Hence, we can find the answer from only statement II and III.

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