PSLE Ivan kept his yellow and silver marbles in two boxes. The ratio of the number of yellow to silver marbles in the first box was 1 : 9 and it was 2 : 3 in the second box. The two boxes contained the same number of marbles. What fraction of Ivan's marbles were silver marbles?
First box |
Second box |
1x10 10 u |
1x10 10 u |
10x1 |
5x2 |
Yellow |
Silver |
Yellow |
Silver |
1x1 |
9x1 |
2x2 |
3x2 |
1 u |
9 u |
4 u |
6 u |
The total number of marbles in the first box and the second box is the same. Make the total number of marbles in each box the same.
LCM of 10 and 5 is 10.
Total number of silver marbles
= 9 u + 6 u
= 15 u
Total number of marbles
= 10 u + 10 u
= 20 u
Fraction of Ivan's marbles that were silver marbles
=
1520 =
34 Answer(s):
34