3 sisters, Rachel, Gem and Mary, paid a total of $41 for a present. Rachel paid
12 of what the others paid. Gem paid
15 of what the others paid. How much did Mary pay?
| Rachel |
Mary |
Gem |
Total |
| 1x2 |
2x2 |
3x2 |
| 5x1 |
1x1 |
6x1 |
| 2 u |
3 u |
1 u |
6 u |
Total cost of the present = 6 u
6 u = 41
1 u = 41 ÷ 6 = 6.83
Amount that Mary paid
= 6 u - 2 u - 1 u
= 3 u
= 3 x 6.83
= $20.50
Answer: $20.50
