Question:
Rylee bought some gold, silver, black and white balloons for a party. The line graph shows the number of balloons of each colour that he bought.
Rylee spent a total amount of $18 on black balloons. The cost of each balloon is the same. How much did Rylee pay for all the balloons?
Solution:
![P6 / Maris Stella / 2019 / SA1 / Paper 2 – Q07 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/04/P6_MarisStella_2019_SA1_Paper2_Q07-Qns.jpg?resize=400%2C222&ssl=1)