PSLE Natalie has a number of markers in three colours: red, green and brown.
27 of the markers are red. The number of red markers is thrice the number of green markers. What fraction of the markers is brown?
Red |
Green |
Brown |
Total |
2x3 |
5x3 |
7x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
13 u |
21 u |
Number of red markers is the repeated identity.
Make the number of red markers the same.
LCM of 2 and 3 = 6
Number of brown markers
= 21 u - 6 u - 2 u
= 13 u
Fraction of the markers that is brown
=
1321 Answer(s):
1321