標題:

中二math

發問:

1)Natalie bought 30 boxes of cosmetics at $3600 .She found that 5 boxes were exppired. If she sold out the remaining at $180 per box, find the profit per cent of this trade.2)A hawker sold 1 500 pieces of key chains at a loss of 20%.He lost a total of $6000.Find the cost price of each key chain.3)A computer game... 顯示更多 1)Natalie bought 30 boxes of cosmetics at $3600 .She found that 5 boxes were exppired. If she sold out the remaining at $180 per box, find the profit per cent of this trade. 2)A hawker sold 1 500 pieces of key chains at a loss of 20%.He lost a total of $6000.Find the cost price of each key chain. 3)A computer game software marked at $280 is sold at 20% off.If the discount is 35% of its price, find the profit per cent.

aa.jpg

 

此文章來自奇摩知識+如有不便請留言告知

最佳解答:

Question 1: Boxes of cosmetics sold = 30 – 5 = 25 So, total selling price = 25 X 180 = $4500 Therefore, profit = 4500 – 3600 = $900 So, profit per cent = profit / cost X 100% = 900 / 3600 X 100% = 25% Question 2: Let $x be the cost of the 1500 keys x(1 -20%) = x – 6000 0.8x = x – 6000 0.2x = 6000 x = 30 000 Therefore, cost of each key = total cost / number of keys = 30 000 / 1500 = $20 Question 3: Selling price = 280 X (1 – 20%) = 280 X 0.8 = $224 So, discount amount = 280 – 224 = $56 And, the cost = 56 / (35%) = 56 X 100 / 35 = $160 Therefore, profit percent = (224 - 160) / 160 X 100% = 64 / 160 X 100% = 40%

其他解答:
文章標籤
創作者介紹
創作者 szw52ts91l 的頭像
szw52ts91l

szw52ts91l的部落格

szw52ts91l 發表在 痞客邦 留言(0) 人氣()