PSLE Wendy has a number of markers in three colours: green, red and orange.
711 of the markers are green. The number of green markers is thrice the number of red markers. What fraction of the markers is orange?
Green |
Red |
Orange |
Total |
7x3 |
4x3 |
11x3 |
3x7 |
1x7 |
|
|
21 u |
7 u |
5 u |
33 u |
Number of green markers is the repeated identity.
Make the number of green markers the same.
LCM of 7 and 3 = 21
Number of orange markers
= 33 u - 21 u - 7 u
= 5 u
Fraction of the markers that is orange
=
533 Answer(s):
533