棍丰伦与散理统针」 D 123 4 P{F=} 0 1/10 0 0 0 1/10 1 0 4/102/101/10 7/10 2 0 0 02/10 2/10 P(D=i 1/104/10 2/10 3/10 1 或将边缘分布律表示为 D1234 F012 P:/104/102/103/10 y10710210D k p 1 2 3 4 1 10 4 10 2 10 3 10 F k p 0 1 2 1 10 7 10 2 10 1 2 3 4 1 10 0 0 0 0 4 10 2 10 1 10 0 0 0 2 10 D F P{F = j} 1 10 7 10 2 10 P{D = i} 1 10 4 10 2 10 3 10 1 或将边缘分布律表示为 0 1 2