PSLE Kylie has a number of notebooks in three colours: purple, yellow and brown.
511 of the notebooks are purple. The number of purple notebooks is twice the number of yellow notebooks. What fraction of the notebooks is brown?
Purple |
Yellow |
Brown |
Total |
5x2 |
6x2 |
11x2 |
2x5 |
1x5 |
|
|
10 u |
5 u |
7 u |
22 u |
Number of purple notebooks is the repeated identity.
Make the number of purple notebooks the same.
LCM of 5 and 2 = 10
Number of brown notebooks
= 22 u - 10 u - 5 u
= 7 u
Fraction of the notebooks that is brown
=
722 Answer(s):
722