PSLE Ian kept his grey and brown marbles in two boxes. The ratio of the number of grey to brown 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 Ian's marbles were brown marbles?
First box |
Second box |
1x10 10 u |
1x10 10 u |
10x1 |
5x2 |
Grey |
Brown |
Grey |
Brown |
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 brown marbles
= 9 u + 6 u
= 15 u
Total number of marbles
= 10 u + 10 u
= 20 u
Fraction of Ian's marbles that were brown marbles
=
1520 =
34 Answer(s):
34