PSLE Jade has a number of notebooks in three colours: yellow, red and brown.
23 of the notebooks are yellow. The number of yellow notebooks is thrice the number of red notebooks. What fraction of the notebooks is brown?
Yellow |
Red |
Brown |
Total |
2x3 |
1x3 |
3x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
1 u |
9 u |
Number of yellow notebooks is the repeated identity.
Make the number of yellow notebooks the same.
LCM of 2 and 3 = 6
Number of brown notebooks
= 9 u - 6 u - 2 u
= 1 u
Fraction of the notebooks that is brown
=
19 Answer(s):
19