请教GWD31-4-1

katie83

Q1:

Of the fruit that arrives at a cannery, 20 percent by weight is rejected before processing.  Of the fruit that is processed, 15 percent by weight is rejected before canning.  Of the fruit that arrives at the cannery, what percent by weight is canned?

 

A.       32%

B.       35%

C.       65%

D.       68%

E.        70%

请问这道题怎么理解啊

lsmc

选e吧

设 weight=1,经过两次pass后,

the last weigth=1*(1-0.2)*(1-0.15)=0.8*0.85=0.7

也不知道对不对,请nn们给予指点

katie83

不对,答案选D

kallyli

lsmc is correct, she just made a slight mistake of calculation.the result is 0.68