Question:
In a test, the average class score was 77 marks. Mr Lim discovered that he had recorded 14 students’ marks wrongly. After adding 3 marks to each of these students, the average class scores became 79. How many students were there in the class?
Solution:
![P6 / Nan Hua / 2019 / SA2 / Paper 2 – Q06 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/07/P6_Nan_Hua_2019_Prelims_Paper2_Q06-Qns.jpg?resize=400%2C260&ssl=1)
