PSLE Dana has a number of pens in three colours: yellow, blue and green.
512 of the pens are yellow. The number of yellow pens is four times the number of blue pens. What fraction of the pens is green?
Yellow |
Blue |
Green |
Total |
5x4 |
7x4 |
12x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
23 u |
48 u |
Number of yellow pens is the repeated identity.
Make the number of yellow pens the same.
LCM of 5 and 4 = 20
Number of green pens
= 48 u - 20 u - 5 u
= 23 u
Fraction of the pens that is green
=
2348 Answer(s):
2348