PSLE Mary has a number of staplers in three colours: green, blue and brown.
411 of the staplers are green. The number of green staplers is thrice the number of blue staplers. What fraction of the staplers is brown?
Green |
Blue |
Brown |
Total |
4x3 |
7x3 |
11x3 |
3x4 |
1x4 |
|
|
12 u |
4 u |
17 u |
33 u |
Number of green staplers is the repeated identity.
Make the number of green staplers the same.
LCM of 4 and 3 = 12
Number of brown staplers
= 33 u - 12 u - 4 u
= 17 u
Fraction of the staplers that is brown
=
1733 Answer(s):
1733