问题如下图：
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NO.PZ2015120604000032 问题如下 Tom bought one share of sto$30 attime 0. the enof ye1, the stopai$5 vinper share anhen Tom bought one more share $35.the enof ye2, Tom sol2 shares for$40 each. Calculate the money-weighterate of returnon this investment. A.14.00%. B.16.00%. C.20.78%. C is correct. On your financicalculator, solve the IRR: 请问该题不用计算器应该怎么算，如何列式
NO.PZ2015120604000032 问题如下 Tom buys one share of sto$30 now, anone more shares $35 after one year. the enof ye1, the stopai$5 vinper share. the enof t2, Tom sol2 shares for $40 each. Calculate the money-weighterate of return on this investment. A.14.00%. B.16.00%. C.20.78%. C is correct. On your financicalculator, solve the IRR: 如上所示，谢谢老师
NO.PZ2015120604000032问题如下Tom buys one share of sto$30 now, anone more shares $35 after one year. the enof ye1, the stopai$5 vinper share. the enof t2, Tom sol2 shares for $40 each. Calculate the money-weighterate of return on this investment.A.14.00%.B.16.00%.C.20.78%.C is correct. On your financicalculator, solve the IRR:为什么分红不是10？
NO.PZ2015120604000032 问题如下 Tom buys one share of sto$30 now, anone more shares $35 after one year. the enof ye1, the stopai$5 vinper share. the enof t2, Tom sol2 shares for $40 each. Calculate the money-weighterate of return on this investment. A.14.00%. B.16.00%. C.20.78%. C is correct. On your financicalculator, solve the IRR: RT另外，题目给的分红为啥现金流计算的时候是5不是10？老师麻烦请详解，有现金流时间轴更好，谢谢！
NO.PZ2015120604000032 问题如下 Tom buys one share of sto$30 now, anone more shares $35 after one year. the enof ye1, the stopai$5 vinper share. the enof t2, Tom sol2 shares for $40 each. Calculate the money-weighterate of return on this investment. A.14.00%. B.16.00%. C.20.78%. C is correct. On your financicalculator, solve the IRR: 我是按照图里这个方式理解的，0时刻买30，一年后买35，在第1年年末也就是第二年年初收到粉红，在第二年年末也就是三年年初卖了，这个方式为什么不对呢？
