1879统计中等essayshort
Full-Universe Average Launch Year
题目
At end-2026, a live panel contains 18 funds launched in 2017 and 24 funds launched in 2021. The survival rates for those vintages were 30% and 80%, respectively.
What was the average launch year across all original launches?
解题计时
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提交作答时记录，用于后续平均用时统计。
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