PSLE A bag contains cards of three different colours.
15 of the cards are brown. The ratio of the number of orange cards to that of purple cards is 7 : 1. What is the ratio of the number of orange cards to that of brown cards?
Brown |
Orange |
Purple |
Total |
1x2 |
4x2 |
5x2 |
|
7x1 |
1x1 |
|
2 u |
7 u |
1 u |
10 u |
The total number of purple and orange cards is the combined repeated identity.
Make the total number purple and orange cards the same.
LCM of 4 and 8 = 8
Orange : Brown
7 : 2
Answer(s): 7 : 2