Question
The average test score of a group of pupils was 82 marks. After three pupils who scored an average of 96 marks left the group, the average score of the group became 79 marks. How many pupils were there at first?
3 m

Click button first when a symbol is required. X

The average test score of a group of pupils was 82 marks. After three pupils who scored an average of 96 marks left the group, the average score of the group became 79 marks. How many pupils were there at first?