Question
PSLE
John kept his black and yellow marbles in two boxes. The ratio of the number of black to yellow marbles in the first box was 1 : 5 and it was 1 : 2 in the second box. The two boxes contained the same number of marbles. What fraction of John's marbles were black marbles?
2 m

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PSLE
John kept his black and yellow marbles in two boxes. The ratio of the number of black to yellow marbles in the first box was 1 : 5 and it was 1 : 2 in the second box. The two boxes contained the same number of marbles. What fraction of John's marbles were black marbles?