PSLE Jade has a number of pens in three colours: brown, orange and purple.
19 of the pens are brown. The number of brown pens is thrice the number of orange pens. What fraction of the pens is purple?
Brown |
Orange |
Purple |
Total |
1x3 |
8x3 |
9x3 |
3x1 |
1x1 |
|
|
3 u |
1 u |
23 u |
27 u |
Number of brown pens is the repeated identity.
Make the number of brown pens the same.
LCM of 1 and 3 = 3
Number of purple pens
= 27 u - 3 u - 1 u
= 23 u
Fraction of the pens that is purple
=
2327 Answer(s):
2327