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    Question

    The average mark obtained by 120 candidates in a certain

    examination is 40. If the average marks of passed candidates are 45 and that of the failed candidates is 20, then what is the number of candidates who passed in the examination?
    A 96 Correct Answer Incorrect Answer
    B 70 Correct Answer Incorrect Answer
    C 88 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    According to question, => 45 ├Ч x + 20 ├Ч (120 тИТ x) = 120 ├Ч 40 => 45x + 2400 тАУ 20x = 4800 => x = 96

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