PSLE Cole kept his white and yellow cards in two boxes. The ratio of the number of white to yellow cards in the first box was 1 : 2 and it was 3 : 4 in the second box. The two boxes contained the same number of cards. What fraction of Cole's cards were yellow cards?
First box |
Second box |
1x21 21 u |
1x21 21 u |
3x7 |
7x3 |
White |
Yellow |
White |
Yellow |
1x7 |
2x7 |
3x3 |
4x3 |
7 u |
14 u |
9 u |
12 u |
The total number of cards in the first box and the second box is the same. Make the total number of cards in each box the same.
LCM of 3 and 7 is 21.
Total number of yellow cards
= 14 u + 12 u
= 26 u
Total number of cards
= 21 u + 21 u
= 42 u
Fraction of Cole's cards that were yellow cards
=
2642 =
1321 Answer(s):
1321