PSLE Emma has a number of markers in three colours: purple, yellow and red.
23 of the markers are purple. The number of purple markers is thrice the number of yellow markers. What fraction of the markers is red?
Purple |
Yellow |
Red |
Total |
2x3 |
1x3 |
3x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
1 u |
9 u |
Number of purple markers is the repeated identity.
Make the number of purple markers the same.
LCM of 2 and 3 = 6
Number of red markers
= 9 u - 6 u - 2 u
= 1 u
Fraction of the markers that is red
=
19 Answer(s):
19