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Average marks of a student in the first 5 terminal exams is 60 and the average of the first 2 terminal exams is 30. Find the average of last 3 terminal exams.1. 602. 703. 804. 10 |
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Answer» Correct Answer - Option 3 : 80 Given∶ Average of first 5 terminal exam = 60 Average of first 2 terminal exam = 30 Calculation∶ Sum of marks in first 5 terminal exam = 60 × 5 = 300 Sum of marks in first 2 terminal exam = 30 × 2 = 60 ⇒ Sum of marks in last 3 terminal exam = 300 - 60 ⇒ Sum of marks in last 3 terminal exam = 240 Average marks of last 3 terminal exam = 240/3 = 80 ∴ The average of last 3 terminal exam is 80. |
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