(1)
Two shops sell the same brand of chocolate at the same price .today they both cut down its price .Shop A lowers the price by 30% ,and increase by 30% after a week . Likewise,shop B lowers its price by 40% ,and increase by 40% after a week .Are the prices of the chocolate at the two shops still the same after a week?
f.2maths
2007-08-18 12:22 am
回答 (2)
2007-08-18 12:28 am
✔ 最佳答案
not the same:Shop A,
Orginal Price: X
Lower the price= 0.7X
After a week = 0.7X (1+30%) = 0.91X
Shop B,
Orginal Price: Y
Lower the price = 0.6Y
After a week = 0.6Y (1+40%) = 0.84Y
2007-08-18 12:28 am
no.
For shopA, = 0.7*1.3=0.91
For shopB, = 0.6*1.4=0.84
For shopA, = 0.7*1.3=0.91
For shopB, = 0.6*1.4=0.84
收錄日期: 2021-04-13 12:58:18
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