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	Choose the correct choice from the following answers.
A) 1
B) 3
C) 4
D) 5
E) 7
Solution: Let the marks obtained in five subjects be 6x, 7x, 8x, 9x and 10x.   Total marks obtained= 40x   Max. Marks of the five subjects = 40x/0.6 [40x is 60% of total marks]   Max. Marks in each subject = 40x/0.6*5 = 13.33x   Hence, % of each subject = 6x*100/13.33 = 45.01%   Or, 7x*100/13.33 = 52.51   In same way other percentage are 60.01%, 67.52%, 75.01%.   Hence, number of subjects in which he gets more than 50% marks = 4.   Answer: Option 4
<result>C</result>
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