[計量] 一題計量麻煩大家囉
if $4500 was invested in 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
(arithmetic mean) price per share purchased ?
我的解法是 (4500*9+3000*10)/(4500+3000)=9.4
答案是9.375
麻煩各位!!謝謝~
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