PSLE Lucy has a number of pencils in three colours: green, red and brown.
17 of the pencils are green. The number of green pencils is twice the number of red pencils. What fraction of the pencils is brown?
Green |
Red |
Brown |
Total |
1x2 |
6x2 |
7x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
11 u |
14 u |
Number of green pencils is the repeated identity.
Make the number of green pencils the same.
LCM of 1 and 2 = 2
Number of brown pencils
= 14 u - 2 u - 1 u
= 11 u
Fraction of the pencils that is brown
=
1114 Answer(s):
1114