有題數唔識呀!!唔該!!好急咖~~
回答 (2)
2006-12-07 10:06 pm
✔ 最佳答案
每打原子筆的原價= 27 / (1 - 55%)
= 27 / 45%
= 27 / (45/100)
= 27 * 100 / 45
= $60
每枝原子筆的售價
= 60 / 12 * 55%
= 5 * 55 / 100
= $2.75
參考: me
2006-12-07 10:20 pm
假設原子筆每枝原價為$X
X * 12 * (1-0.55) = 27
X = 5
如你問的是原價, 就是$5, 問啟章買原子筆的價錢, 就是$5 * 0.55 = $2.75
X * 12 * (1-0.55) = 27
X = 5
如你問的是原價, 就是$5, 問啟章買原子筆的價錢, 就是$5 * 0.55 = $2.75
收錄日期: 2021-04-12 19:04:56
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061207000051KK01566