數問題快、快、快(20點)

1) tg x 65/100 = 52g
65tg/100=52g
65tg = 5200tg
t= 5200g/65g
t= 80

2) Let y be the original price 標價
y x 4/100 = $120
y = $120 x 100/4
y標價 = $3000
售價 = $3000 - $120 = $2880

3) Therefore, the original price of the ticket is $400.
if getting 15% profit, the selling price will be:
$400 x 115/100 = $460

A)
1) 10000 pcs = $12800, each pc = $1.28
$1.28 + $0.22 = $1.50 per pc (for selling price)
So, 每盒CD-R 售價 = $150
2) 每箱售價 =$15000
每箱 profit percentage: $15000/$12800 = 17.1875%

B)
$75 each bag (50 pcs), each pc = $75/50 = $1.50 per pc.
每 箱 = 10000 pcs = $15000(售價)
$15000 - $12800 = $2200 (profit)
$2200/$12800= 17.1875% (每箱profit percentage)

問題一:

52g是tg的65%,求t值
t(65%)=52
t=80


2008-08-27 20:59:36 補充：
問題二:

若折扣為120元,折扣率是4%,求標價及售價。
售價X(4%)=120
售價=3000
標價=3000+120=3120元

2008-08-27 21:02:05 補充：
問題三:

天賜若以$350出售門票便會虧蝕$50。
即原價是$400,若他想得到15%的盈利,他應賣:
400(1+15%)=460元

2008-08-27 21:17:50 補充：
(A)
(1)
每隻CD-R獲$0.22的盈利,即每盒獲利$0.22x100=$22
每盒CD-R的售價=128+22=$150
(2) 每箱的盈利百分率=(22/128)(100%)=17.1875%

2008-08-27 21:24:07 補充：
(B)
$75售出每袋50隻CD-R,即每隻售$75/50=$1.5
成本價為$1.28
每箱的盈利百分率
=(1.5-1.28)(100%)
=22%