你好 丙净现值=200/(1+10%)+200/(1+10%)^2+150/(1+10%)^3+150/(1+10%)^4+100/(1+10%)^5+50/(1+10%)^6-500=152.56 丁净现值=100/(1+10%)+100/(1+10%)^2+150/(1+10%)^3+200/(1+10%)^4+200/(1+10%)^5+250/(1+10%)^6-500=188.16 内部收益率 丙方案：=22.08% 丁方案=20.01% 互斥项目，互斥项目采用净现值法和内含报酬率法可行性判断不一致时,净现值法更有效，所以选择丁项目，因为净现值更高。