Question:
A basket contained red, blue and yellow balls only. The ratio of the number of red balls to the number of blue balls is 4 : 3. The ratio of the number of blue balls to the number of yellow balls is 2 : 3.
a) Find the ratio of the number of yellow balls to the number of red balls.
b) After 15 yellow balls were removed, 30% of the remaining balls were yellow. How many balls were left in the basket?
Solution:
![P6 / Red Swastika / 2020 / SA2 Prelims / Paper 2 – Q03 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/11/P6_Red_Swastika_2020_SA2_Paper2_Q03-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Catholic High / 2021 / SA2 / Paper 1
– Q07 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/05/P6_SA2_2021_Catholic_High_Paper1_Q07-Qns.jpg?resize=400%2C260&ssl=1)