Question:
In 2018, there were 864 children in a dance club. In 2019, some boys and girls joined the club. As a result, there was a 20% increase in the number of boys and 25% increase in the number of girls. Then the ratio of the number of boys to the number of girls in 2019 was 6 : 5. How many girls were there in the club in 2019?
Solution:
![P6 / ACS / 2018 / SA1 / Paper 1 – Q11 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/04/P6_SA1_2018_ACS_Paper1_Q11-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / ACS (Junior) / 2021 / SA2 Prelims / Paper 1 – Q18 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/05/P6_SA2_2021_ACS_Junior_Paper1_Q18-Qns.jpg?resize=400%2C119&ssl=1)