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