PSLE Barbara has a number of pens in three colours: brown, yellow and purple.
23 of the pens are brown. The number of brown pens is four times the number of yellow pens. What fraction of the pens is purple?
Brown |
Yellow |
Purple |
Total |
2x2 |
1x2 |
3x2 |
4x1 |
1x1 |
|
|
4 u |
1 u |
1 u |
6 u |
Number of brown pens is the repeated identity.
Make the number of brown pens the same.
LCM of 2 and 4 = 4
Number of purple pens
= 6 u - 4 u - 1 u
= 1 u
Fraction of the pens that is purple
=
16 Answer(s):
16