Question
Oscar bought 2 bags of cards. In each bag, there were 20 cards. He used 3 of the cards and gave some of them to his sister. 18 of his cards were then left. What fraction of the cards he bought were given to his sister?
4 m

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Oscar bought 2 bags of cards. In each bag, there were 20 cards. He used 3 of the cards and gave some of them to his sister. 18 of his cards were then left. What fraction of the cards he bought were given to his sister?