Lily wants to buy some pencils of the same price. If she buys 5 pencils, she will have $7.90 left. If she buys 7 pencils, she will short of $2.50.
- How much does each pencil cost?
- How much does Lily have?
(a)
Difference in the number of pencils
= 7 - 5
= 2
Amount that Lily needs to buy 2 pencils
= 7.90 + 2.50
= $10.40
Cost of each pencil
= 10.40 ÷ 2
= $5.20
(b)
Amount that Lily has
= 5 x 5.20 + 7.90
= $33.90
Answer(s): (a) $5.20; (b) $33.90