標題:

maths about profit (help!!!)

發問:

A buys 600汪,10% of which are rotten. BY selling the good ones at$ 5 a dozen, he makes a profit of 50% on the whole i) find the original cost of one dozen eggs ii)find the profit percenttage if he sells the good ones at$0.5each

最佳解答:

此文章來自奇摩知識+如有不便請留言告知

係咪 買 600 隻, 10% 壞左? 當你係 let x be original cost of one dozen eggs 好既有 (600)(90%) = 540 隻 賣到 (540)(5)/12 = 225 元 (225 - 總成本 ) / 總成本 = 50% 總成本 = 150 元 (買到 600 隻) x = (150)(12)/ 600 = 3 -------------------------------------------------- 賣到 (0.5)(540) = 270 元 (270 - 150) / 150 * 100% = 80%

其他解答:4E350C6F8B48ECA2
arrow
arrow

    nzphddr 發表在 痞客邦 留言(0) 人氣()