PSLE Esther has a number of pens in three colours: purple, green and red.
59 of the pens are purple. The number of purple pens is four times the number of green pens. What fraction of the pens is red?
Purple |
Green |
Red |
Total |
5x4 |
4x4 |
9x4 |
4x5 |
1x5 |
|
|
20 u |
5 u |
11 u |
36 u |
Number of purple pens is the repeated identity.
Make the number of purple pens the same.
LCM of 5 and 4 = 20
Number of red pens
= 36 u - 20 u - 5 u
= 11 u
Fraction of the pens that is red
=
1136 Answer(s):
1136