A student took five papers in an examination, where the full marks were the same for each paper. His marks in these papers were in the proportion of 6 : 7 : 8 : 9 : 10. In all papers together, the candidate obtained 60% of the total marks. Then the number of papers in which he got more than 50% marks is
Let the marks scored in five subjects be 6x, 7x, 8x, 9x and 10x.
Average score = 60%
(6x+7x+8x+9x+10x)/5 = 60%
x = 7.5
Marks obtained are 45%, 52.5%, 60%, 67.5 and 75%.
The student got more than 50% marks in more than 4 subjects.
The correct option is C.