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