PSLE Cathy has a number of markers in three colours: green, purple and blue.
110 of the markers are green. The number of green markers is twice the number of purple markers. What fraction of the markers is blue?
Green |
Purple |
Blue |
Total |
1x2 |
9x2 |
10x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
17 u |
20 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 blue markers
= 20 u - 2 u - 1 u
= 17 u
Fraction of the markers that is blue
=
1720 Answer(s):
1720