Discussion

Explanation:

Let the maximum marks for each of the paper = 100

∴ Total maximum marks = 5 × 100 = 500

Let the marks obtained by the student be 6x, 7x, 8x, 9x and 10x in each of the paper.

∴ 6x + 7x + 8x + 9x + 10x = 60% of 500

40x = 300

∴ x = 7.5

∴ The marks obtained in each of the paper will be 45, 52.5, 60, 67.5 and 75.

∴ In 4 papers he got more than 50% marks.

Hence, option (c).

Alternatively

Average of 6, 7, 8, 9 and 10 = $\frac{6+7+8+9+10}{5}=8$

∵ 60% of marks = 8

∴ 50% of marks = $\frac{8}{60}\times 50$

= 6.67

∴ The score in 4 of the subjects is more than 6.67.

Hence, option (c).

» Your doubt will be displayed only after approval.