PSLE Rachel has a number of pencils in three colours: purple, red and green.
23 of the pencils are purple. The number of purple pencils is thrice the number of red pencils. What fraction of the pencils is green?
Purple |
Red |
Green |
Total |
2x3 |
1x3 |
3x3 |
3x2 |
1x2 |
|
|
6 u |
2 u |
1 u |
9 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 green pencils
= 9 u - 6 u - 2 u
= 1 u
Fraction of the pencils that is green
=
19 Answer(s):
19