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