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Baby Kingdom - 親子王國香港討論區 › 首頁 › 自由講場› 求救! S1數學題

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求救! S1數學題 [複製鏈接]

tulip

大宅

積分: 2628

1^#

發表於 16-12-28 20:54 |只看該作者 |倒序瀏覽 |打印

The marked prices of two sweaters A and B are both $1200. If they are sold at 5% off,the profit percent of sweater A is 50%, while the loss percent sweater B is 50%.A) Find the selling prices of sweater A and B.
B) Find the cost prices of the two sweaters respectively.
C) What is the overall profit or loss?

0 0 0

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大B_mama_小B

男爵府

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發表於 16-12-28 21:24 |只看該作者

回覆樓主:

幫推

我個仔S1, 佢就困擾呢maths

http://www.poohfriends.com/userpages/images/pictures/all04.gif

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小甸

大宅

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發表於 16-12-28 21:32 |只看該作者

tulip 發表於 16-12-28 20:54
The marked prices of two sweaters A and B are both $1200. If they are sold at 5% off,the profit perc ...

本帖最後由小甸於 16-12-28 21:38 編輯

本帖最後由小甸於 16-12-28 21:35 編輯

本帖最後由小甸於 16-12-28 21:33 編輯

A)sweaters A&B:1200×(1-5%)
=1200×95%
=1140

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tulip

大宅

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發表於 16-12-28 21:33 |只看該作者

係囉！佢同條數糾纏咗好耐呀！
所以上嚟求救, 麻煩各位。

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Alex123

珍珠宮

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發表於 16-12-28 21:36 |只看該作者

tulip 發表於 16-12-28 20:54
The marked prices of two sweaters A and B are both $1200. If they are sold at 5% off,the profit perc ...

A) 1200 x 0.95 = 1140.
Both are selling for $1140

B) sweater A cost is
1140 / 1.5 = 760
Sweater B cost is
1140 / 0.5 = 2280

C) the total cost is
760 + 2280 = 3040
The total selling amount is 1140 + 1140 = 2280.
So it is loss

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birdbird

水晶宮

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發表於 16-12-28 21:38 |只看該作者

本帖最後由 birdbird 於 16-12-28 21:43 編輯

(a)the marked price = $1200
selling price = $1200 (0.95) = $1140

(b)
For sweater A, let x be the cost.
For sweater B, let y be the cost.

with 50% profit for sweater A -->
1.5 x = 1200 (0.95)
x = 760

with 50% loss for sweater B -->
0.5y = 1200 (0.95)
y= 2280

cost of sweater A = $760
cost of sweater B = $2280

(c) overall profit / loss:

total income - total cost = [1140(2) - (760 +2280)]
= -$760

% loss= 760/(760+2280) (100%) = 25%