A notebook cost $2.50. A stapler cost $12.50 more than the notebook. Usha spent $150 on such notebooks and staplers. She bought four times as many notebooks as staplers.
- How many staplers did Usha buy?
- How much money did Usha spend on the notebooks?
|
Notebooks |
Staplers |
Total |
Number |
4 u |
1 u |
|
Value |
2.50 |
15 |
|
Total value |
10 u |
15 u |
150 |
(a)
Cost of a stapler
= 12.50 + 2.50
= $15
Total cost of notebooks and staplers
= 10 u + 15 u
= 25 u
25 u = 150
1 u = 150 ÷ 25 = 6
Number of staplers that Usha bought
= 1 u
= 6
(b)
Amount that Usha spent on notebooks
= 10 u
= 10 x 6
= $60
Answer(s): (a) 6; (b) $60