PSLE Emma has a number of notebooks in three colours: brown, red and orange.
411 of the notebooks are brown. The number of brown notebooks is thrice the number of red notebooks. What fraction of the notebooks is orange?
Brown |
Red |
Orange |
Total |
4x3 |
7x3 |
11x3 |
3x4 |
1x4 |
|
|
12 u |
4 u |
17 u |
33 u |
Number of brown notebooks is the repeated identity.
Make the number of brown notebooks the same.
LCM of 4 and 3 = 12
Number of orange notebooks
= 33 u - 12 u - 4 u
= 17 u
Fraction of the notebooks that is orange
=
1733 Answer(s):
1733