PSLE Rachel has a number of pens in three colours: brown, yellow and purple.
37 of the pens are brown. The number of brown pens is twice the number of yellow pens. What fraction of the pens is purple?
Brown |
Yellow |
Purple |
Total |
3x2 |
4x2 |
7x2 |
2x3 |
1x3 |
|
|
6 u |
3 u |
5 u |
14 u |
Number of brown pens is the repeated identity.
Make the number of brown pens the same.
LCM of 3 and 2 = 6
Number of purple pens
= 14 u - 6 u - 3 u
= 5 u
Fraction of the pens that is purple
=
514 Answer(s):
514