PSLE Tammy has a number of markers in three colours: yellow, red and orange.
13 of the markers are yellow. The number of yellow markers is four times the number of red markers. What fraction of the markers is orange?
Yellow |
Red |
Orange |
Total |
1x4 |
2x4 |
3x4 |
4x1 |
1x1 |
|
|
4 u |
1 u |
7 u |
12 u |
Number of yellow markers is the repeated identity.
Make the number of yellow markers the same.
LCM of 1 and 4 = 4
Number of orange markers
= 12 u - 4 u - 1 u
= 7 u
Fraction of the markers that is orange
=
712 Answer(s):
712