Question

超难数学题，求高手，要过程

• 你的回答被采纳后将获得：
• 系统奖励15（财富值+成长值）+难题奖励20（财富值+成长值）

Answer 1

B 卖出t
A 卖出0.6t

B成本每件Y
A成本每件X

则(0.6t * 1.2x + t*1.3y)/(0.6t*x+t*y) = 5/4

5y=3x

后面的利润=(t*1.2x+t*1.3y-t*x-t*y)/(t*x+t*y)
= 19/80
=23.75%

Answer 2

A的成本a,B的成本b;
A的数量A,B的数量B;
A1=60%B1，
(A1a20%+B1b30%)/(A1a+B1b)=(60%a20%+b30%)/(a60%+b)=25%=(12a+30b)/(60a+100b)=1/4
12a+30b=15a+25b,3a=5b,b=0.6a

A2=B2,
(A2a20%+B2b30%)/(A2a+B2b)=(a20%+b30%)/(a+b)=a20%+0.6a30%)(a+0.6a)=38%/1.6=23.75%

Answer 3

24.17%，采纳后给过程