PSLE Gem has a number of markers in three colours: brown, yellow and purple.
49 of the markers are brown. The number of brown markers is thrice the number of yellow markers. What fraction of the markers is purple?
Brown |
Yellow |
Purple |
Total |
4x3 |
5x3 |
9x3 |
3x4 |
1x4 |
|
|
12 u |
4 u |
11 u |
27 u |
Number of brown markers is the repeated identity.
Make the number of brown markers the same.
LCM of 4 and 3 = 12
Number of purple markers
= 27 u - 12 u - 4 u
= 11 u
Fraction of the markers that is purple
=
1127 Answer(s):
1127