PSLE Hazel has a number of markers in three colours: red, green and purple.
411 of the markers are red. The number of red markers is twice the number of green markers. What fraction of the markers is purple?
Red |
Green |
Purple |
Total |
4x1 |
7x1 |
11x1 |
2x2 |
1x2 |
|
|
4 u |
2 u |
5 u |
11 u |
Number of red markers is the repeated identity.
Make the number of red markers the same.
LCM of 4 and 2 = 4
Number of purple markers
= 11 u - 4 u - 2 u
= 5 u
Fraction of the markers that is purple
=
511 Answer(s):
511