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Average marks of 22 students is 48. Two girls who scored 35 and 38 marks left the class.One girl who scored 46 marks join the class. Now, find the average marks of the students.
1. 48
2. 49
3. 20
4. 35

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Correct Answer - Option 2 : 49
Given
Average marks of 22 students = 48
Girls who left the class scored 35 and 38 marks
One girl who joined the class score 46 marks
Concept
Average = Sum of all observation/ Number of observation
Calculation
Total marks scored by 22 students = 22 × 48
= 1056
Number of students left in the class = 22 - 2 + 1
= 21
Total marks scored by 21 students = 1056 - 35 - 38 + 46
= 1029
Average marks of 21 students = 1029/21
= 49

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