Question
PSLE
Ethan kept his black and red cards in two boxes. The ratio of the number of black to red cards in the first box was 1 : 5 and it was 1 : 9 in the second box. The two boxes contained the same number of cards. What fraction of Ethan's cards were red cards?
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PSLE
Ethan kept his black and red cards in two boxes. The ratio of the number of black to red cards in the first box was 1 : 5 and it was 1 : 9 in the second box. The two boxes contained the same number of cards. What fraction of Ethan's cards were red cards?