PSLE Elyse has a number of pencils in three colours: purple, red and orange.
27 of the pencils are purple. The number of purple pencils is thrice the number of red pencils. What fraction of the pencils is orange?
Purple |
Red |
Orange |
Total |
2x3 |
5x3 |
7x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
13 u |
21 u |
Number of purple pencils is the repeated identity.
Make the number of purple pencils the same.
LCM of 2 and 3 = 6
Number of orange pencils
= 21 u - 6 u - 2 u
= 13 u
Fraction of the pencils that is orange
=
1321 Answer(s):
1321