【其它话题】愁死了，小三数学题怎么做？在线等指教！Candice makes gift boxes during her free time.
She charges 40 cents for a triangular box, 50cents for a heart-shaped box and 60 centss for a cylindrical box.
Last sunday, she sold 16 diffierent types of gifts boxes and collected a total of $8.
How many of each type of box did she sell?
受不了，文科生太费脑。求各路高手指教。该帖荣获当日十大第2，奖励楼主18分以及27华新币，时间：2016-04-27 22:00:01。
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答案不是唯一的
A-square
B-heart
C-cylinder
answer:
B=2*n (0<=n<=8）
A=C=(16-B)/2=8-n
The reason is that the average price is 8/16=0.5. price of B is 0.5 already, so we just keep it to be even number. Otherwise, the 0.4m+0.6m cannot be ended up with 0.5.
If you want to make the average price to be 0.5. You have to make A and C average to 0.5. That is, you have to prepare equal amount of both.
B-heart
C-cylinder
answer:
B=2*n (0<=n<=8）
A=C=(16-B)/2=8-n
The reason is that the average price is 8/16=0.5. price of B is 0.5 already, so we just keep it to be even number. Otherwise, the 0.4m+0.6m cannot be ended up with 0.5.
If you want to make the average price to be 0.5. You have to make A and C average to 0.5. That is, you have to prepare equal amount of both.
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