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