Question:
There were three types of fruit in a box. The ratio of the number of mangoes to the total number of apples and oranges was 2 : 5. The ratio of the number of apples to the number of oranges was 9 : 1. There were 30 more apples than mangoes. After some mangoes were added into the box, 70% of the fruits in the box were mangoes.
(a) How many mangoes were there in the end?
(b) How many mangoes were added in the box?
Solution:
![P6 / ACS / 2019 / SA1 / Paper 2 – Q13 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/03/P6_ACS_2019_SA1_Paper2_Q13-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / ACS / 2019 / CA1 – Q08 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/01/P6_ACS_2019_CA1_Q08-Qns.jpg?resize=400%2C199&ssl=1)