PSLE Raeann has a number of files in three colours: purple, blue and orange.
57 of the files are purple. The number of purple files is four times the number of blue files. What fraction of the files is orange?
Purple |
Blue |
Orange |
Total |
5x4 |
2x4 |
7x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
3 u |
28 u |
Number of purple files is the repeated identity.
Make the number of purple files the same.
LCM of 5 and 4 = 20
Number of orange files
= 28 u - 20 u - 5 u
= 3 u
Fraction of the files that is orange
=
328 Answer(s):
328