PSLE Erika has a number of pens in three colours: blue, yellow and brown.
23 of the pens are blue. The number of blue pens is four times the number of yellow pens. What fraction of the pens is brown?
Blue |
Yellow |
Brown |
Total |
2x2 |
1x2 |
3x2 |
4x1 |
1x1 |
|
|
4 u |
1 u |
1 u |
6 u |
Number of blue pens is the repeated identity.
Make the number of blue pens the same.
LCM of 2 and 4 = 4
Number of brown pens
= 6 u - 4 u - 1 u
= 1 u
Fraction of the pens that is brown
=
16 Answer(s):
16