Internal rate of return is the financial flows to present value of total aggregate present value of outflows equivalent, net present value discount rate equals zero.
Internal rate of return is the total amount of capital inflows and the present value of the total capital flow appear equal value, net present value discount rate equal to zero.
The internal rate of return is the discount rate which is equal to the total value of the capital inflow and the total value of the capital flow, and the net present value equals to zero.