PSLE Irene has a number of files in three colours: purple, blue and brown.
12 of the files are purple. The number of purple files is twice the number of blue files. What fraction of the files is brown?
Purple |
Blue |
Brown |
Total |
1x2 |
1x2 |
2x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
1 u |
4 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 brown files
= 4 u - 2 u - 1 u
= 1 u
Fraction of the files that is brown
=
14 Answer(s):
14