Re: [計量] If $4500 was invested in a bond ...
※ 引述《shugh (我)》之銘言：
: If $4500 was invested in a bond fund when the price per share was $9 and
: $3000 was invested in the fund when the price per share was $10, what was
: the average (arithemetic mean) price per share puchased?
: ans: 9.20
: 恩，我不太懂這種投資的問題...
: (或是這根本跟投資沒關係...>"<)
: 拜託大家了
4500 / 9 = 500
第一次投資所獲得的股數
3000 / 10 = 300
第二次投資所獲得的股數
4500+3000 / 500+300 = 9.375
總共投資金額除以全部的股數就等於平均價格
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