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 – Q11 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/03/P6_ACS_2019_SA1_Paper2_Q11-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Maha Bodhi / 2019 / SA2 / Paper 2 – Q06 [3 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/06/P6_Maha_Bodhi_2019_Prelims_Paper2_Q06-Qns.jpg?resize=400%2C260&ssl=1)