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    A student's average marks in 15 examinations are 45. How many marks must he score in the next examination to increase his average marks by 2?
    Question

    A student's average marks in 15 examinations are 45. How many marks must he score in the next examination to increase his average marks by 2?

    A.

    55

    B.

    77

    C.

    66

    D.

    88

    Correct option is B

    Calculate Current Total Marks

    Multiply the current average (45) by the number of exams (15): 45 × 15 = 675

    Calculate Target Total Marks

    Multiply the desired average (47) by the total number of exams after the next exam (16): 47 × 16 = 752

    Calculate Required Marks in Next Exam

    Subtract the current total marks (675) from the target total marks (752): 752 - 675 = 77

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