PSLE Zoe has a number of files in three colours: brown, red and orange.
19 of the files are brown. The number of brown files is thrice the number of red files. What fraction of the files is orange?
Brown |
Red |
Orange |
Total |
1x3 |
8x3 |
9x3 |
3x1 |
1x1 |
|
|
3 u |
1 u |
23 u |
27 u |
Number of brown files is the repeated identity.
Make the number of brown files the same.
LCM of 1 and 3 = 3
Number of orange files
= 27 u - 3 u - 1 u
= 23 u
Fraction of the files that is orange
=
2327 Answer(s):
2327