The cost of 9 mangoes and 5 apples is equal to the cost of 7 mangoes and 8 apples. Find the ratio between the cost of 1 mango and the cost of one apple.
ক
3 : 2
খ
2 : 3
গ
5 : 8
ঘ
9 : 7
সঠিক উত্তর: 3 : 2