3 friends shared the cost of a present equally. When calculating the amount each friend had to pay, a mistake was made. The cost of the present was divided by 4 instead of 3. Each friend ended up paying $2.80 less than the correct amount. What should be the correct amount for each share?
|
3 friends |
4 friends |
Number |
3 |
4 |
Value |
1 u + 2.80 |
1 u |
Total value |
3 u + 8.40 |
4 u |
Total cost of the present if it was paid by 3 friends
= 3(1 u + 2.80)
= 3 u + 8.40
Total cost of the present if it was paid by 4 friends = 4 u
4 u = 3 u + 8.40
4 u - 3 u = 8.40
1 u = 8.40
Correct amount for each share
= 1 u + 2.80
= 8.40 + 2.80
= $11.20
Answer(s): $11.20