PSLE Justin kept his pink and white balls in two boxes. The ratio of the number of pink to white balls in the first box was 1 : 9 and it was 2 : 3 in the second box. The two boxes contained the same number of balls. What fraction of Justin's balls were white balls?
First box |
Second box |
1x10 10 u |
1x10 10 u |
10x1 |
5x2 |
Pink |
White |
Pink |
White |
1x1 |
9x1 |
2x2 |
3x2 |
1 u |
9 u |
4 u |
6 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 10 and 5 is 10.
Total number of white balls
= 9 u + 6 u
= 15 u
Total number of balls
= 10 u + 10 u
= 20 u
Fraction of Justin's balls that were white balls
=
1520 =
34 Answer(s):
34