PSLE Marion has a number of files in three colours: orange, red and blue.
511 of the files are orange. The number of orange files is thrice the number of red files. What fraction of the files is blue?
Orange |
Red |
Blue |
Total |
5x3 |
6x3 |
11x3 |
3x5 |
1x5 |
|
|
15 u |
5 u |
13 u |
33 u |
Number of orange files is the repeated identity.
Make the number of orange files the same.
LCM of 5 and 3 = 15
Number of blue files
= 33 u - 15 u - 5 u
= 13 u
Fraction of the files that is blue
=
1333 Answer(s):
1333