PSLE Risa has a number of markers in three colours: yellow, green and red.
12 of the markers are yellow. The number of yellow markers is twice the number of green markers. What fraction of the markers is red?
Yellow |
Green |
Red |
Total |
1x2 |
1x2 |
2x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
1 u |
4 u |
Number of yellow markers is the repeated identity.
Make the number of yellow markers the same.
LCM of 1 and 2 = 2
Number of red markers
= 4 u - 2 u - 1 u
= 1 u
Fraction of the markers that is red
=
14 Answer(s):
14