PSLE Fanny has a number of notebooks in three colours: blue, yellow and purple.
811 of the notebooks are blue. The number of blue notebooks is thrice the number of yellow notebooks. What fraction of the notebooks is purple?
Blue |
Yellow |
Purple |
Total |
8x3 |
3x3 |
11x3 |
3x8 |
1x8 |
|
|
24 u |
8 u |
1 u |
33 u |
Number of blue notebooks is the repeated identity.
Make the number of blue notebooks the same.
LCM of 8 and 3 = 24
Number of purple notebooks
= 33 u - 24 u - 8 u
= 1 u
Fraction of the notebooks that is purple
=
133 Answer(s):
133