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    Question

    In an examination, a student has an average score of 84.

    If he had scored 14 more marks in Science and 19 more marks in English, his average would increase to 89.5. How many subjects did he study in total?
    A 9 Correct Answer Incorrect Answer
    B 8 Correct Answer Incorrect Answer
    C 7 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer
    E none Correct Answer Incorrect Answer

    Solution

    Let he studies total number of subjects = n His total marks = 84n In second condition- (84n + 14 + 19)/n = 89.5 84n + 33 = 89.5n 5.5n = 33 n = 6 He studies a total number of 6 subjects.

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