PSLE Lucy has a number of files in three colours: brown, orange and purple.
23 of the files are brown. The number of brown files is thrice the number of orange files. What fraction of the files is purple?
Brown |
Orange |
Purple |
Total |
2x3 |
1x3 |
3x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
1 u |
9 u |
Number of brown files is the repeated identity.
Make the number of brown files the same.
LCM of 2 and 3 = 6
Number of purple files
= 9 u - 6 u - 2 u
= 1 u
Fraction of the files that is purple
=
19 Answer(s):
19