Multiple Choice Questions on The marks scored by Prasoon Joshi in three subjects are in the ratio 4 5 6 Prasoon Joshi scored an o........... for Mathematics - All Exams Preparation

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The marks scored by Prasoon Joshi in three subjects are in the ratio 4 5 6 Prasoon Joshi scored an o...........

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    The marks scored by Prasoon Joshi in three subjects are in the ratio 4 : 5 : 6. Prasoon Joshi scored an overall aggregate of 60% in the exam. If the maximum marks in each subject are the same, in how many subjects did Prasoon Joshi score more than 70% marks?

    one

    Correct Answer

    two

    Incorrect Answer

    three

    Incorrect Answer

    zero

    Incorrect Answer
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    Explanation:
    Let the maximum marks in each subject be 100.
    ∴ Prasoon joshi's total score = 60% of (100 + 100 + 100) = 0.6(300) = 180
    Also, 70% marks in a subject correspond to 0.7(100) = 70
    Let Prashoon joshi have scored 4x, 5x and 6x in the three subjects.
    ∴ 4x + 5x + 6x = 180
    ∴ 15x = 180 i.e. x = 12
    Hence, his marks in the three subjects are 48, 60 and 72 .
    Hence, he has scored more than 70 in exactly one subject. 

    By: Amit Kumar
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