PSLE Kylie has a number of notebooks in three colours: orange, purple and blue.
15 of the notebooks are orange. The number of orange notebooks is twice the number of purple notebooks. What fraction of the notebooks is blue?
Orange |
Purple |
Blue |
Total |
1x2 |
4x2 |
5x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
7 u |
10 u |
Number of orange notebooks is the repeated identity.
Make the number of orange notebooks the same.
LCM of 1 and 2 = 2
Number of blue notebooks
= 10 u - 2 u - 1 u
= 7 u
Fraction of the notebooks that is blue
=
710 Answer(s):
710