NO.PZ2023080903000004
问题如下:
An investor invests $3,000 annually in a financial product for four years at the following prices: $40.00, $55.00, $62.00, and $70.00. Which average price calculation is most suitable for this context?
选项:
A.Weighted mean of $59.25
Harmonic mean of $54.35
Arithmetic mean of $61.75
解释:
Sum of reciprocals = 1 / 40.00 + 1 / 55.00 + 1 / 62.00 + 1 / 70.00 =0.025 + 0.01818 + 0.01613 + 0.01429 = 0.07360
Harmonic Mean = 4 / 0.07360 = 54.35
So, the harmonic mean of the given prices is approximately $54.35.
怎么计算weight mean average price?