Carl has a total of 48 of white and blue staplers.
14 of the white staplers and half of the blue staplers are new. How many of his blue staplers are new if he has a total of 13 new staplers?
| |
White staplers |
Blue staplers |
Total |
| Total |
4 u |
2 p |
48 |
| New |
1 u |
1 p |
13 |
| Old |
3 u |
1 p |
35 |
Number of old staplers
= 48 - 13
= 35
1 u + 1 p = 13 --- (1)
3 u + 1 p = 35 --- (2)
(2) - (1)
(3 u + 1 p) - (1 u + 1 p) = 35 - 13
3 u - 1 u = 22
2 u = 22
1 u = 22 ÷ 2 = 11
Number of new blue staplers
= 13 - 1 u
= 13 - 11
= 2
Answer(s): 2
