Wesley has a total of 52 of brown and green staplers.
16 of the brown staplers and half of the green staplers are new. How many of his green staplers are new if he has a total of 10 new staplers?
| |
Brown staplers |
Green staplers |
Total |
| Total |
6 u |
2 p |
52 |
| New |
1 u |
1 p |
10 |
| Old |
5 u |
1 p |
42 |
Number of old staplers
= 52 - 10
= 42
1 u + 1 p = 10 --- (1)
5 u + 1 p = 42 --- (2)
(2) - (1)
(5 u + 1 p) - (1 u + 1 p) = 42 - 10
5 u - 1 u = 32
4 u = 32
1 u = 32 ÷ 4 = 8
Number of new green staplers
= 10 - 1 u
= 10 - 8
= 2
Answer(s): 2
