PSLE Nora has a number of pens in three colours: yellow, orange and blue.
59 of the pens are yellow. The number of yellow pens is thrice the number of orange pens. What fraction of the pens is blue?
Yellow |
Orange |
Blue |
Total |
5x3 |
4x3 |
9x3 |
3x5 |
1x5 |
|
|
15 u |
5 u |
7 u |
27 u |
Number of yellow pens is the repeated identity.
Make the number of yellow pens the same.
LCM of 5 and 3 = 15
Number of blue pens
= 27 u - 15 u - 5 u
= 7 u
Fraction of the pens that is blue
=
727 Answer(s):
727