PSLE Raeann has a number of files in three colours: brown, blue and red.
411 of the files are brown. The number of brown files is twice the number of blue files. What fraction of the files is red?
Brown |
Blue |
Red |
Total |
4x1 |
7x1 |
11x1 |
2x2 |
1x2 |
|
|
4 u |
2 u |
5 u |
11 u |
Number of brown files is the repeated identity.
Make the number of brown files the same.
LCM of 4 and 2 = 4
Number of red files
= 11 u - 4 u - 2 u
= 5 u
Fraction of the files that is red
=
511 Answer(s):
511