PSLE Gillian has a number of pens in three colours: red, orange and brown.
14 of the pens are red. The number of red pens is four times the number of orange pens. What fraction of the pens is brown?
Red |
Orange |
Brown |
Total |
1x4 |
3x4 |
4x4 |
4x1 |
1x1 |
|
|
4 u |
1 u |
11 u |
16 u |
Number of red pens is the repeated identity.
Make the number of red pens the same.
LCM of 1 and 4 = 4
Number of brown pens
= 16 u - 4 u - 1 u
= 11 u
Fraction of the pens that is brown
=
1116 Answer(s):
1116