英语翻译A store normally sells each of its DVDs for $20.At a sale,Phy_英语解答

英语翻译
A store normally sells each of its DVDs for $20.At a sale,Phyllis buys two DVDs at the regelur price and gets a third DVD for half price.This is the same rate of discount as getting ( )
A 2 for the price 1
B 3 for the price 2
C 4 for the price3
D 5 for the price 4
E 6 for the price 5

人气：397 ℃　时间：2020-02-05 19:30:01

解答

一个商店正常卖一个DVD是20美元,Phyllis在正常价格下买了两张DVD并且得到DVD三分之一价格的优惠.在这样的折扣率下买（）A 两个用一个的价格B 三个用两个的价格C 四个用三个的价格D 五个用四个的价格E 六个用五个的价...