PSLE Jane has a number of notebooks in three colours: green, blue and brown.
19 of the notebooks are green. The number of green notebooks is four times the number of blue notebooks. What fraction of the notebooks is brown?
Green |
Blue |
Brown |
Total |
1x4 |
8x4 |
9x4 |
4x1 |
1x1 |
|
|
4 u |
1 u |
31 u |
36 u |
Number of green notebooks is the repeated identity.
Make the number of green notebooks the same.
LCM of 1 and 4 = 4
Number of brown notebooks
= 36 u - 4 u - 1 u
= 31 u
Fraction of the notebooks that is brown
=
3136 Answer(s):
3136