PSLE Roshel has a number of markers in three colours: orange, brown and red.
13 of the markers are orange. The number of orange markers is thrice the number of brown markers. What fraction of the markers is red?
Orange |
Brown |
Red |
Total |
1x3 |
2x3 |
3x3 |
3x1 |
1x1 |
|
|
3 u |
1 u |
5 u |
9 u |
Number of orange markers is the repeated identity.
Make the number of orange markers the same.
LCM of 1 and 3 = 3
Number of red markers
= 9 u - 3 u - 1 u
= 5 u
Fraction of the markers that is red
=
59 Answer(s):
59