3 girls shared the cost of a present equally. When calculating the amount each girl had to pay, a mistake was made. The cost of the present was divided by 4 instead of 3. Each girl ended up paying $3.90 less than the correct amount. What should be the correct amount for each share?
| |
3 girls |
4 girls |
| Number |
3 |
4 |
| Value |
1 u + 3.90 |
1 u |
| Total value |
3 u + 11.70 |
4 u |
Total cost of the present if it was paid by 3 girls
= 3(1 u + 3.90)
= 3 u + 11.70
Total cost of the present if it was paid by 4 girls = 4 u
4 u = 3 u + 11.70
4 u - 3 u = 11.70
1 u = 11.70
Correct amount for each share
= 1 u + 3.90
= 11.70 + 3.90
= $15.60
Answer(s): $15.60
