一道英文数学题,求翻译+答案,谢谢
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一道英文数学题,求翻译+答案,谢谢
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
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
![一道英文数学题,求翻译+答案,谢谢](/uploads/image/z/15280334-62-4.jpg?t=%E4%B8%80%E9%81%93%E8%8B%B1%E6%96%87%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E6%B1%82%E7%BF%BB%E8%AF%91%2B%E7%AD%94%E6%A1%88%2C%E8%B0%A2%E8%B0%A2)
选E,题目大意是一个商店正常销售的DVD20美元一张,一次菲利斯以正常价买了2张DVD,随后半价买到第3张,则下面相同的折扣率是:
A.1张的价格买到2张
B.2张的价格买到3张
C.3张的价格买到4张
D.4张的价格买到5张
E.5张的价格买到6张
计算可知 菲利斯买3张共花费20+20+10=50美元,所以按比率计算就是100美元可以买到6张,而正常20元一张,100/20=5,所以用5张的价格买到6张DVD.
A.1张的价格买到2张
B.2张的价格买到3张
C.3张的价格买到4张
D.4张的价格买到5张
E.5张的价格买到6张
计算可知 菲利斯买3张共花费20+20+10=50美元,所以按比率计算就是100美元可以买到6张,而正常20元一张,100/20=5,所以用5张的价格买到6张DVD.