PSLE Vanessa has a number of pens in three colours: yellow, blue and red.
34 of the pens are yellow. The number of yellow pens is four times the number of blue pens. What fraction of the pens is red?
Yellow |
Blue |
Red |
Total |
3x4 |
1x4 |
4x4 |
4x3 |
1x3 |
|
|
12 u |
3 u |
1 u |
16 u |
Number of yellow pens is the repeated identity.
Make the number of yellow pens the same.
LCM of 3 and 4 = 12
Number of red pens
= 16 u - 12 u - 3 u
= 1 u
Fraction of the pens that is red
=
116 Answer(s):
116