PSLE Wesley kept his silver and black balls in two boxes. The ratio of the number of silver to black balls in the first box was 5 : 7 and it was 1 : 2 in the second box. The two boxes contained the same number of balls. What fraction of Wesley's balls were silver balls?
First box |
Second box |
1x12 12 u |
1x12 12 u |
12x1 |
3x4 |
Silver |
Black |
Silver |
Black |
5x1 |
7x1 |
1x4 |
2x4 |
5 u |
7 u |
4 u |
8 u |
The total number of balls in the first box and the second box is the same. Make the total number of balls in each box the same. LCM of 12 and 3 is 12.
Total number of silver balls
= 5 u + 4 u
= 9 u
Total number of balls
= 12 u + 12 u
= 24 u
Fraction of Wesley's balls that were silver balls
=
924 =
38 Answer(s):
38