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A farmer buys a horse for $ He sells it to his
问题详情
A farmer buys a horse for $ He sells it to his neighbour for $ Then he discovers he could have made a better deal. He borrows $ 10 from his wife, and buys the horse back for $ 80. He then sells it to another neighbour for $ How much money did he make？请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：$10
$10 解析：第一次买马花费$60，卖了$70，共盈利$10。第二次买马花费$80，卖了$90，再除去借妻子的$10，共盈利$0。所以，通过两次对马的买和卖，他共盈利$10。
