PSLE Cathy has a number of files in three colours: blue, yellow and purple.
512 of the files are blue. The number of blue files is four times the number of yellow files. What fraction of the files is purple?
Blue |
Yellow |
Purple |
Total |
5x4 |
7x4 |
12x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
23 u |
48 u |
Number of blue files is the repeated identity.
Make the number of blue files the same.
LCM of 5 and 4 = 20
Number of purple files
= 48 u - 20 u - 5 u
= 23 u
Fraction of the files that is purple
=
2348 Answer(s):
2348