1. The discount rate that gives an NPV of zero is the project‘s IRR.
1
2. The IRR is the discount rate that equates the present value of the cash inflows with the present value of outflows.
2
3. For mutually exclusive projects, if the NPV method and the IRR method give conflicting rankings, you should use the IRRs to select the project
3
4. The NPV method assumes that cash flows will be reinvested at the cost of capital while IRR rankings implicitly assume that cash flows are reinvested at the IRR.
4
Answer
For mutually exclusive projects, if the NPV method and the IRR method give conflicting rankings, you should use the IRRs to select the project