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 / 2018 / SA1 / Paper 2 – Q07 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/05/P6_SA1_2018_Catholic_High_Paper2_Q07-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / ACS / 2018 / SA1 / Paper 1 – Q20 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/04/P6_SA1_2018_ACS_Paper1_Q20-Qns.jpg?resize=400%2C260&ssl=1)