PSLE Dana has a number of notebooks in three colours: orange, yellow and red.
12 of the notebooks are orange. The number of orange notebooks is twice the number of yellow notebooks. What fraction of the notebooks is red?
Orange |
Yellow |
Red |
Total |
1x2 |
1x2 |
2x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
1 u |
4 u |
Number of orange notebooks is the repeated identity.
Make the number of orange notebooks the same.
LCM of 1 and 2 = 2
Number of red notebooks
= 4 u - 2 u - 1 u
= 1 u
Fraction of the notebooks that is red
=
14 Answer(s):
14