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Question : 9 of 40

Marks: +1, -0

A student got 60% average marks in five compulsory subjects. He got equal marks in each of the two optional subjects and if the marks of these two subjects are added to the marks of the compulsory subjects, the average of marks is reduced by 4%. What percentage of marks did he get in each of the optional subjects?

46%
52%
50%
56%

Solution:

Average marks in five subjects = 60%

Total marks = 60 × 5 = 300

Let marks obtained in the optional subject = x

According to the statements,

\frac{300+2x}{7}=60-4

300+2x=56 \times 7

300+2x=392

x=46\%

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