1. Kent spent 55% of his pocket money on buying a computer games, 25% on buying a musical disa and saved the rest.If she saved $20,find the total pocket money he had.
2. If John selld the tickets for concert at a price of $350, he will lose$50.If he wants to get a profit of 15%,what should be the selling price?
3.A case of CD-RS has 100 boxes.Each box has 100 pieces of CD-RS.The cost price of each box is $128.If the merchant wants to get a profit of $0.22 for each CD-RS.
(a) find(i) the selling price of each box.
(ii) the profits% of each case.
(b) the merchant wants to change his selling strategy.He decides to sell a pack of 50 pieces of CD-RS at a price of$74.Find the profit % of each case.
Math`
2008-08-25 12:46 am
回答 (2)
2008-08-25 1:24 am
✔ 最佳答案
1.Let $S be the total pocket money that John had.
S - (55% + 25%)S = 20
S - 0.8S = 20
0.2S = 20
S = 100
Ans: John had $100 of pocket money.
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2.
Cost of the tickets = $350 + $50
Cost of the tickets = $400
Selling price of the tickets = $400 x (100 + 15)%
Selling price of the tickets = $460
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3.(a)(i)
Profit for each box = $0.22 x 100
Profit for each box = $22
The selling price of each box = $128 + $22
The selling price of each box = $150
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(a)(ii)
Cost of each case = $128 x 100 = $12800
Profit of each case = $0.22 x 100 x 100 = $2200
Profit % of each case = ($2200/$12800) x 100%
Profit % of each case = 17.1875%
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3.(b)
Selling price of each box = $74 x (100/50)
Selling price of each box = $148
Selling price of each case = $148 x 100
Selling price of each case = $14800
Profit of each case = $14800 - $12800
Profit of each case = $2000
Profit % of each case = ($2000/$12800) x 100%
Profit % of each case = 15.625%
=
2008-08-25 1:53 am
1. let X be the total pocket money
X*(1-55%-25%)=$20
X*20%=$20
X=$100
2. sell$ 350 will lost $50,so the original price is $400.
$400*(1+15%)
=$460
3. 1st find out the selling price for each CDR, $128/100+0.22=$1.5
then each box has 100 pcs CDR,so the selling price of each box is
a) (i) $1.5*100=$150
(ii) ($150*100-$128*100)/$128*100*100%=17.1875%
b)($74*2-$128)/$128*100%=15.625%
X*(1-55%-25%)=$20
X*20%=$20
X=$100
2. sell$ 350 will lost $50,so the original price is $400.
$400*(1+15%)
=$460
3. 1st find out the selling price for each CDR, $128/100+0.22=$1.5
then each box has 100 pcs CDR,so the selling price of each box is
a) (i) $1.5*100=$150
(ii) ($150*100-$128*100)/$128*100*100%=17.1875%
b)($74*2-$128)/$128*100%=15.625%
參考: me
收錄日期: 2021-04-24 09:53:02
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