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