A boutique is holding a 30% sale. A customer with VIP card can get an extra 20% off. Mary with VIP card paid $616 to buy a dress. What is the original price of the dress?
A. $770
B. $880
C. $990
D. $1100
Maths
2009-07-02 7:08 pm
回答 (4)
2009-07-03 2:00 am
The original price of the dress
616 ÷ (1 - 30%) ÷ (1 - 20%)
= 616 ÷ 0.7 ÷ 0.8
= $1100
= D
616 ÷ (1 - 30%) ÷ (1 - 20%)
= 616 ÷ 0.7 ÷ 0.8
= $1100
= D
參考: me
2009-07-02 8:16 pm
answer is D
because
(616+616*20%)+(616+616*20%*30%)
=1100
because
(616+616*20%)+(616+616*20%*30%)
=1100
2009-07-02 7:23 pm
30%and than20%sale=44%sale
the original price of the dress is:
616÷(1-44%)
=616÷56%
=1100
So D. is correct.
the original price of the dress is:
616÷(1-44%)
=616÷56%
=1100
So D. is correct.
2009-07-02 7:22 pm
Let the original price of the dress be y.
(1-30%)y * (1-20%)= 616
70%y*80%= 616
70%y= 616/80%
70%y=770
y=770/70%
y=1100
The original price of the dress is $1100.(D.)
2009-07-02 11:23:57 補充：
hope I can help you~~
(1-30%)y * (1-20%)= 616
70%y*80%= 616
70%y= 616/80%
70%y=770
y=770/70%
y=1100
The original price of the dress is $1100.(D.)
2009-07-02 11:23:57 補充：
hope I can help you~~
參考: mememe
收錄日期: 2021-04-29 22:17:21
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