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 / Catholic High / 2021 / SA2 / Paper 1
– Q18 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/05/P6_SA2_2021_Catholic_High_Paper1_Q18-Qns.jpg?resize=400%2C244&ssl=1)
![P6 / CHIJ / 2019 / SA1 / Paper 2 – Q14 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/03/P6_CHIJ_2019_SA1_Paper2_Q14-Qns.jpg?resize=400%2C260&ssl=1)