The average of 10 students is 80. The average becomes 85 after adding 5 more students. What is the total marks of the 5 new students?
- 425
- 475
- 500
- None of these
Explanation
Total marks of 10 students = 10 × 80 = 800
Total marks of 15 students = 15 × 85 = 1275
Total marks of 5 new students = 1275 - 800 = 475
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