In an examination, the average marks of the student in class were 85.4. If the student had got 8 more marks in History, 12 more marks in Science, 10 more marks in Computer Science, 15 less marks in Hindi and retained the same marks in other subjects, then the average would have been 87.9. How many subjects were there in the examination?
A.7
B.6✓ Correct
C.5
D.8
Explanation
Net change in marks = 8+12+10−15 = 15. Difference in average = 87.9−85.4 = 2.5. Number of subjects = 15/2.5 = 6.
💡 Practice unlimited SSC MTS PYQs + AI-tracked progress on each topic. Sign up free →