PSLE Wendy has a number of notebooks in three colours: brown, blue and orange.
15 of the notebooks are brown. The number of brown notebooks is thrice the number of blue notebooks. What fraction of the notebooks is orange?
Brown |
Blue |
Orange |
Total |
1x3 |
4x3 |
5x3 |
3x1 |
1x1 |
|
|
3 u |
1 u |
11 u |
15 u |
Number of brown notebooks is the repeated identity.
Make the number of brown notebooks the same.
LCM of 1 and 3 = 3
Number of orange notebooks
= 15 u - 3 u - 1 u
= 11 u
Fraction of the notebooks that is orange
=
1115 Answer(s):
1115