两个少年在市场上卖苹果,一个要2个卖5角,另一个要3个卖1元。他们的篮子里各有30个苹果,第一个少年可以卖7元5角,第二个少年可以卖10元。为了表示友好和便于买卖,他们商定:把两个人的苹果合起来卖,不挑不选,1元5角5个。卖完后,他们惊奇地发现:结果卖了18元,比原来能卖的钱多出5 Two teenagers sell apples in the market, one for two to sell five horns, the other three to sell for one dollar. They have 30 apples in their baskets. The first teenager can sell 7 yuan and 5 horns, and the second teenager can sell 10 yuan. In order to show their friendliness and ease of trading, they agreed that the sale of the two men’s apples should be done together without any vote. After selling, they were surprised to find that the result was sold for 18 yuan, 5 more than the original could sell