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 $3.30 less than the correct amount. What should be the correct amount for each share?
|
3 friends |
4 friends |
Number |
3 |
4 |
Value |
1 u + 3.30 |
1 u |
Total value |
3 u + 9.90 |
4 u |
Total cost of the present if it was paid by 3 friends
= 3(1 u + 3.30)
= 3 u + 9.90
Total cost of the present if it was paid by 4 friends = 4 u
4 u = 3 u + 9.90
4 u - 3 u = 9.90
1 u = 9.90
Correct amount for each share
= 1 u + 3.30
= 9.90 + 3.30
= $13.20
Answer(s): $13.20