PSLE Cathy has a number of files in three colours: blue, brown and green.
15 of the files are blue. The number of blue files is twice the number of brown files. What fraction of the files is green?
Blue |
Brown |
Green |
Total |
1x2 |
4x2 |
5x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
7 u |
10 u |
Number of blue files is the repeated identity.
Make the number of blue files the same.
LCM of 1 and 2 = 2
Number of green files
= 10 u - 2 u - 1 u
= 7 u
Fraction of the files that is green
=
710 Answer(s):
710