PSLE John kept files in boxes X and Y. Box X contained thrice as many files as box Y. In box X,
15 of the files were yellow files. In box Y,
12 of the files were yellow files. What fraction of John's files were yellow files?
Box X |
Box Y |
Total |
3x2x5 |
1x2x5 |
4x2x5 |
Y |
Not yellow |
Y |
Not yellow |
|
1x6 |
4x6 |
1x1x5 |
1x1x5 |
|
6 u |
24 u |
5 u |
5 u |
40 u |
LCM of 5 and 6 is 30.
Number of yellow files
= 6 u + 5 u
= 11 u
Total number of files = 40 u
Fraction of John's files that were yellow =
1140 Answer(s):
1140