PSLE Risa has a number of notebooks in three colours: red, orange and yellow.
311 of the notebooks are red. The number of red notebooks is twice the number of orange notebooks. What fraction of the notebooks is yellow?
Red |
Orange |
Yellow |
Total |
3x2 |
8x2 |
11x2 |
2x3 |
1x3 |
|
|
6 u |
3 u |
13 u |
22 u |
Number of red notebooks is the repeated identity.
Make the number of red notebooks the same.
LCM of 3 and 2 = 6
Number of yellow notebooks
= 22 u - 6 u - 3 u
= 13 u
Fraction of the notebooks that is yellow
=
1322 Answer(s):
1322