excans:9938b2eea6: Difference between revisions
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Latest revision as of 02:34, 18 January 2024
Answer: B
[[math]]
\begin{aligned}
& e_{40}=e_{40: 20}+{ }_{20} p_{40} \cdot e_{60} \\
& =18+(1-0.2)(25) \\
& =38 \\
& e_{40}=e_{40: 11}+p_{40} \cdot e_{41} \\
& \Rightarrow e_{41}=\frac{e_{40}-e_{40: 11}}{p_{40}}=\frac{e_{40}-p_{40}}{p_{40}}=\frac{38-0.997}{0.997}=37.11434
\end{aligned}
[[/math]]