PSLE Pamela has a number of notebooks in three colours: red, green and orange.
18 of the notebooks are red. The number of red notebooks is twice the number of green notebooks. What fraction of the notebooks is orange?
Red |
Green |
Orange |
Total |
1x2 |
7x2 |
8x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
13 u |
16 u |
Number of red notebooks is the repeated identity.
Make the number of red notebooks the same.
LCM of 1 and 2 = 2
Number of orange notebooks
= 16 u - 2 u - 1 u
= 13 u
Fraction of the notebooks that is orange
=
1316 Answer(s):
1316