英文的关于机会成本的问题
问题描述：
英文的关于机会成本的问题
1.suppose there are 3 alternatives to attending a social event:read a novel(you value this at 5 dollars),or watch a film(you value this at 10),or go to work(you can earn 7 dollars).The opportunity cost of attending the social event is?
请说明原因··谢谢
答
(1/3)*5+(1/3)*10-(1/3)*7=8/3
因为read a novel,watch a film,go to work的机会均等,那么概率都是1/3,题目要我们求期望,用公式一代就可以了