1)kitty bought a abbit and a hamster for $220 and $35 respectively.
She sold the rabbit to David for $250 and sold the hamster to Dawn at a profit of 60%.Find the overall profit per cent that Kitty made on selling the two animals.
2)A company purchased 50 sets of software at $80000.The first 40 set were sold at $2000 each and the remaining 10 sets were sold at $900 each.
(a)Find the profit per cent for the first 40sets of software.
(b)Find the loss %for the last 10 sets of software.
(c)Find the overall profit per cent or loss per cent.
3)Mr Lam buys 50 dozens apples for $720and he finds that 10% of them are rotten.If Mr Lamwants to make an overall profit of 50%,what shouldbe the selling price of each remaining apple?
4)Yesterday,Mr kim is store sold a refrigerator for $2400 at a loss of 20%,and a TV set for $7200 at a loss of 40%.
(a)Find the cost price of the refrigerator .
(b)Find the cost price of the TV set.
(c)Find the overall loss profit per cent for Mr kim is on the two items.
F.1 math (4)
2010-11-04 7:16 am
回答 (2)
2010-11-04 9:28 pm
✔ 最佳答案
sol1. The selling price of the hamster
=35 x (1+60%)
=35 x 1.6
=$56
The overall profit per cent that Kitty made on selling the two animals
={[(56+250)-(35+220)] / (220+35)} x 100%
= [(306-225) / 255] x 100%
=36%
2.a) The profit per cent for the first 40sets of software
=(2000-80000/50)/(80000/50) x 100%
= [(2000-1600)/1600] x 100%
=(400/1600) x 100%
=25%
b) The loss %for the last 10 sets of software
=[(80000/50)-900/(80000/50)] x 100%
=[(1600-900)/1600] x 100%
=43.75%
c){[(2000 x 40+900x 10)-80000]/80000} x 100%
=[(80900-80000)/80000]x 100%
=(900/80000) x 100%
=1.125%
So,the overall profit per cent is 1.125%.
3. The number of the remaining apple
=50 x 12 - 50 x 12 x 10%
=600 - 600 x 10%
=600 - 60
=540
The selling price of each remaining apple
=720 x (1+50%) / 540
=720 x 1.5 / 540
=$2
4.a) The cost price of the refrigerator
=2400 / (1- 20%)
=2400 / 0.8
=$3000
b) The cost price of the TV set
=7200 / (1-40%)
=7200 / 0.6
=$12000
c)The overall loss profit per cent for Mr kim is on the two items
={[(12000+3000) - (2400+7200)] / (12000+3000)} x 100%
=[(15000 - 12000) / 15000] x 100%
=20%
2010-11-04 7:32 pm
1. The selling price of the hamster
=35 x (1+60%)
=35 x 1.6
=$56
The overall profit per cent that Kitty made on selling the two animals
={[(56+250)-(35+220)] / (220+35)} x 100%
= [(306-225) / 255] x 100%
=81/255 x 100%
=36%
2.a) The profit per cent for the first 40sets of software
=(2000-80000/50)/(80000/50) x 100%
= [(2000-1600)/1600] x 100%
=(400/1600) x 100%
=25%
b) The loss %for the last 10 sets of software
=[(80000/50)-900/(80000/50)] x 100%
=[(1600-900)/1600] x 100%
=43.75%
c){[(2000 x 40+900x 10)-80000]/80000} x 100%
=[(80900-80000)/80000]x 100%
=(900/80000) x 100%
=1.125%
So,the overall profit per cent is 1.125%.
3. The number of the remaining apple
=50 x 12 - 50 x 12 x 10%
=600 - 600 x 10%
=600 - 60
=540
The selling price of each remaining apple
=720 x (1+50%) / 540
=720 x 1.5 / 540
=1080 / 540
=$2
4.a) The cost price of the refrigerator
=2400 / (1- 20%)
=2400 / 0.8
=$3000
b) The cost price of the TV set
=7200 / (1-40%)
=7200 / 0.6
=$12000
c)The overall loss profit per cent for Mr kim is on the two items
={[(12000+3000) - (2400+7200)] / (12000+3000)} x 100%
=[(15000 - 12000) / 15000] x 100%
=20%
=35 x (1+60%)
=35 x 1.6
=$56
The overall profit per cent that Kitty made on selling the two animals
={[(56+250)-(35+220)] / (220+35)} x 100%
= [(306-225) / 255] x 100%
=81/255 x 100%
=36%
2.a) The profit per cent for the first 40sets of software
=(2000-80000/50)/(80000/50) x 100%
= [(2000-1600)/1600] x 100%
=(400/1600) x 100%
=25%
b) The loss %for the last 10 sets of software
=[(80000/50)-900/(80000/50)] x 100%
=[(1600-900)/1600] x 100%
=43.75%
c){[(2000 x 40+900x 10)-80000]/80000} x 100%
=[(80900-80000)/80000]x 100%
=(900/80000) x 100%
=1.125%
So,the overall profit per cent is 1.125%.
3. The number of the remaining apple
=50 x 12 - 50 x 12 x 10%
=600 - 600 x 10%
=600 - 60
=540
The selling price of each remaining apple
=720 x (1+50%) / 540
=720 x 1.5 / 540
=1080 / 540
=$2
4.a) The cost price of the refrigerator
=2400 / (1- 20%)
=2400 / 0.8
=$3000
b) The cost price of the TV set
=7200 / (1-40%)
=7200 / 0.6
=$12000
c)The overall loss profit per cent for Mr kim is on the two items
={[(12000+3000) - (2400+7200)] / (12000+3000)} x 100%
=[(15000 - 12000) / 15000] x 100%
=20%
收錄日期: 2021-04-23 20:48:22
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101103000051KK01730