PSLE Xandra has a number of pencils in three colours: orange, green and purple.
13 of the pencils are orange. The number of orange pencils is four times the number of green pencils. What fraction of the pencils is purple?
Orange |
Green |
Purple |
Total |
1x4 |
2x4 |
3x4 |
4x1 |
1x1 |
|
|
4 u |
1 u |
7 u |
12 u |
Number of orange pencils is the repeated identity.
Make the number of orange pencils the same.
LCM of 1 and 4 = 4
Number of purple pencils
= 12 u - 4 u - 1 u
= 7 u
Fraction of the pencils that is purple
=
712 Answer(s):
712