PSLE Tiffany has a number of pens in three colours: red, orange and purple.
34 of the pens are red. The number of red pens is four times the number of orange pens. What fraction of the pens is purple?
Red |
Orange |
Purple |
Total |
3x4 |
1x4 |
4x4 |
4x3 |
1x3 |
|
|
12 u |
3 u |
1 u |
16 u |
Number of red pens is the repeated identity.
Make the number of red pens the same.
LCM of 3 and 4 = 12
Number of purple pens
= 16 u - 12 u - 3 u
= 1 u
Fraction of the pens that is purple
=
116 Answer(s):
116