1881统计简单essayshort
True Turnover of the Launch Universe
题目
Among currently live funds, 40 are low-turnover and 20 are high-turnover. Historical survival rates were 80% for low-turnover funds and 40% for high-turnover funds. Suppose low-turnover funds average 60% annual turnover and high-turnover funds average 180% annual turnover.
What was the average turnover across the original launch universe?
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