PSLE Eva has a number of markers in three colours: red, blue and orange.
511 of the markers are red. The number of red markers is twice the number of blue markers. What fraction of the markers is orange?
Red |
Blue |
Orange |
Total |
5x2 |
6x2 |
11x2 |
2x5 |
1x5 |
|
|
10 u |
5 u |
7 u |
22 u |
Number of red markers is the repeated identity.
Make the number of red markers the same.
LCM of 5 and 2 = 10
Number of orange markers
= 22 u - 10 u - 5 u
= 7 u
Fraction of the markers that is orange
=
722 Answer(s):
722