PSLE Sabrina has a number of pencils in three colours: purple, red and yellow.
34 of the pencils are purple. The number of purple pencils is four times the number of red pencils. What fraction of the pencils is yellow?
Purple |
Red |
Yellow |
Total |
3x4 |
1x4 |
4x4 |
4x3 |
1x3 |
|
|
12 u |
3 u |
1 u |
16 u |
Number of purple pencils is the repeated identity.
Make the number of purple pencils the same.
LCM of 3 and 4 = 12
Number of yellow pencils
= 16 u - 12 u - 3 u
= 1 u
Fraction of the pencils that is yellow
=
116 Answer(s):
116