PSLE Zoe has a number of pencils in three colours: blue, orange and brown.
59 of the pencils are blue. The number of blue pencils is four times the number of orange pencils. What fraction of the pencils is brown?
Blue |
Orange |
Brown |
Total |
5x4 |
4x4 |
9x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
11 u |
36 u |
Number of blue pencils is the repeated identity.
Make the number of blue pencils the same.
LCM of 5 and 4 = 20
Number of brown pencils
= 36 u - 20 u - 5 u
= 11 u
Fraction of the pencils that is brown
=
1136 Answer(s):
1136