PSLE Cathy has a number of files in three colours: yellow, blue and brown.
311 of the files are yellow. The number of yellow files is twice the number of blue files. What fraction of the files is brown?
Yellow |
Blue |
Brown |
Total |
3x2 |
8x2 |
11x2 |
2x3 |
1x3 |
|
|
6 u |
3 u |
13 u |
22 u |
Number of yellow files is the repeated identity.
Make the number of yellow files the same.
LCM of 3 and 2 = 6
Number of brown files
= 22 u - 6 u - 3 u
= 13 u
Fraction of the files that is brown
=
1322 Answer(s):
1322