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 / Catholic High / 2021 / SA2 / Paper 1
– Q27 [2 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/05/P6_SA2_2021_Catholic_High_Paper1_Q27-Qns.jpg?resize=400%2C169&ssl=1)
![P6 / Catholic High / 2021 / SA2 / Paper 1
– Q03 [1 mark]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2022/05/P6_SA2_2021_Catholic_High_Paper1_Q03-Qns.jpg?resize=400%2C260&ssl=1)