PSLE Jen has a number of markers in three colours: brown, blue and purple.
25 of the markers are brown. The number of brown markers is thrice the number of blue markers. What fraction of the markers is purple?
Brown |
Blue |
Purple |
Total |
2x3 |
3x3 |
5x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
7 u |
15 u |
Number of brown markers is the repeated identity.
Make the number of brown markers the same.
LCM of 2 and 3 = 6
Number of purple markers
= 15 u - 6 u - 2 u
= 7 u
Fraction of the markers that is purple
=
715 Answer(s):
715