Q3 PERCENTAGES
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
a. 2
b. 3
c. 4
d. 5Let 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
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
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