John wants to buy some files of the same price. If she buys 2 files, she will have $3.10 left. If she buys 5 files, she will short of $1.10.
- How much does each file cost?
- How much does John have?
(a)
Difference in the number of files
= 5 - 2
= 3
Amount that John needs to buy 3 files
= 3.10 + 1.10
= $4.20
Cost of each file
= 4.20 ÷ 3
= $1.40
(b)
Amount that John has
= 2 x 1.40 + 3.10
= $5.90
Answer(s): (a) $1.40; (b) $5.90