PSLE Gillian has a number of pens in three colours: yellow, purple and red.
311 of the pens are yellow. The number of yellow pens is twice the number of purple pens. What fraction of the pens is red?
Yellow |
Purple |
Red |
Total |
3x2 |
8x2 |
11x2 |
2x3 |
1x3 |
|
|
6 u |
3 u |
13 u |
22 u |
Number of yellow pens is the repeated identity.
Make the number of yellow pens the same.
LCM of 3 and 2 = 6
Number of red pens
= 22 u - 6 u - 3 u
= 13 u
Fraction of the pens that is red
=
1322 Answer(s):
1322