PSLE Jen has a number of notebooks in three colours: blue, purple and brown.
111 of the notebooks are blue. The number of blue notebooks is twice the number of purple notebooks. What fraction of the notebooks is brown?
Blue |
Purple |
Brown |
Total |
1x2 |
10x2 |
11x2 |
2x1 |
1x1 |
|
|
2 u |
1 u |
19 u |
22 u |
Number of blue notebooks is the repeated identity.
Make the number of blue notebooks the same.
LCM of 1 and 2 = 2
Number of brown notebooks
= 22 u - 2 u - 1 u
= 19 u
Fraction of the notebooks that is brown
=
1922 Answer(s):
1922