某东西sell at price 20 dollors, including tax, 税率是百份P,还包括其他什么费less than C,好象问:不含税的部分小于15吗?A:P等于6,B:C等于5
答案肯定是E,都不充分
我认为,20=tax+c+剩余部分, 既然,c=5,那么 tax必然小于15,不知道大家是否同意, 欢迎指正,大案为b
100个某东西,买来的时候30元一个,全部卖出后赢利1500刀元。其中N个以每个50元卖出,其余的以每个X刀元卖出。问X LESS THAN 40?
1)N > 60
2) N < 80
答案是A , 请大家讨论!
1. my question is , is the extra fee tax deductable ?
that is , the equation is (x+c)(1+p)=20 or x(1+p)+c=20 ?
whatever , I think B is sufficient ,
if c=5 ; x, or x+c must be less than 15
2. last weeks' JJ
20N + (100-N)(x-30)=1500
from which we know N must <75
if N>60
(100-N)(x-30)<300
x always <40
^^