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    Question

    The average mark obtained by 160 candidates in a certain

    examination is 60. If the average marks of passed candidates are 65 and that of the failed candidates is 25, then what is the number of candidates who passed in the examination?
    A 150 Correct Answer Incorrect Answer
    B 120 Correct Answer Incorrect Answer
    C 140 Correct Answer Incorrect Answer
    D 100 Correct Answer Incorrect Answer

    Solution

    According to question, => 65 × x + 25 × (160 − x) = 160 × 60 => 65x + 4000 – 25x = 9600 => x = 140

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