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