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