Question
The average marks of 25 students in a test is 68. When
the marks of a new student are added, the average becomes 69. What are the marks of the new student?Solution
ATQ, Total marks of 25 students = 25 × 68 = 1,700 After adding new student (26 students): New average = 69 New total = 26 × 69 = 1,794 Marks of new student = 1,794 − 1,700 = 94
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