方針
Z=1-X-Yなので，実質二変数である．
1-x-y=(1-x)(1-\frac{y}{1-x})
なる変形を知っておけばあとは計算を頑張るだけ．
答案
参考文献
- 『現代数理統計学の基礎』(久保川達也 著)
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