PSLE Winnie has a number of markers in three colours: red, purple and brown.
57 of the markers are red. The number of red markers is four times the number of purple markers. What fraction of the markers is brown?
Red |
Purple |
Brown |
Total |
5x4 |
2x4 |
7x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
3 u |
28 u |
Number of red markers is the repeated identity.
Make the number of red markers the same.
LCM of 5 and 4 = 20
Number of brown markers
= 28 u - 20 u - 5 u
= 3 u
Fraction of the markers that is brown
=
328 Answer(s):
328