Question:
Some children took a Mathematics test. Their average score was 78.1 marks. One of the children’s scores was wrongly recorded as 79 marks instead of 97 marks. As a result, the average score was calculated as 76.3 marks. How many children sat for the test?
Solution:
![P6 / Rosyth / 2019 / SA1 / Paper 2 – Q02 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_Rosyth_2019_SA1_Paper2_Q02-Qns.jpg?resize=400%2C204&ssl=1)
![P6 / Nanyang / 2019 / SA1 / Paper 2 – Q10 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/05/P6_Nanyang_2019_SA1_Paper2_Q10-Qns.jpg?resize=400%2C260&ssl=1)