PSLE Abi has a number of staplers in three colours: purple, green and brown.
711 of the staplers are purple. The number of purple staplers is thrice the number of green staplers. What fraction of the staplers is brown?
Purple |
Green |
Brown |
Total |
7x3 |
4x3 |
11x3 |
3x7 |
1x7 |
|
|
21 u |
7 u |
5 u |
33 u |
Number of purple staplers is the repeated identity.
Make the number of purple staplers the same.
LCM of 7 and 3 = 21
Number of brown staplers
= 33 u - 21 u - 7 u
= 5 u
Fraction of the staplers that is brown
=
533 Answer(s):
533