The average marks of five students is 18. If the marks of another student are also included, their average marks become 19. Find the marks of the sixth student?
Answer: 24 marks
Explanation
Total marks of 5 students = 5 × 18 = 90
Total marks of 6 students = 6 × 19 = 114
Marks of the sixth student = 114 - 90 = 24
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