PSLE Ryan kept his gold and white marbles in two boxes. The ratio of the number of gold to white marbles in the first box was 1 : 5 and it was 3 : 7 in the second box. The two boxes contained the same number of marbles. What fraction of Ryan's marbles were white marbles?
First box |
Second box |
1x30 30 u |
1x30 30 u |
6x5 |
10x3 |
Gold |
White |
Gold |
White |
1x5 |
5x5 |
3x3 |
7x3 |
5 u |
25 u |
9 u |
21 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 6 and 10 is 30.
Total number of white marbles
= 25 u + 21 u
= 46 u
Total number of marbles
= 30 u + 30 u
= 60 u
Fraction of Ryan's marbles that were white marbles
=
4660 =
2330 Answer(s):
2330