我数学第一题就是腰果题,不过我记得和你有些不一样。我记的是,peasants mix 1.5pound cashew nuts and 6 pound brazil nuts. the resulting snacked is sold at 1.5 dollar per 0.25 pounds. to the peasants, only brazil nuts are counted as cost. The profit is 50% of the cost. Ask the cost is how much per pound.