PSLE Kathy has a number of files in three colours: purple, red and orange.
47 of the files are purple. The number of purple files is twice the number of red files. What fraction of the files is orange?
Purple |
Red |
Orange |
Total |
4x1 |
3x1 |
7x1 |
2x2 |
1x2 |
|
|
4 u |
2 u |
1 u |
7 u |
Number of purple files is the repeated identity.
Make the number of purple files the same.
LCM of 4 and 2 = 4
Number of orange files
= 7 u - 4 u - 2 u
= 1 u
Fraction of the files that is orange
=
17 Answer(s):
17