推 jasonkeen:條件機率呀～ 07/12 01:01
2 servers are labeled A&B. Incoming jobs are independently
routed to server A with prob "p" and B with prob "1-P".The
number of jobs arriving per unit time is Poisson distributed
with parameter 入.Determine the distribution funtion of the
number of jobs received by server A,per unit time.
我的想法
r.v.Xi 第i個工作到A的
r.v.Y 工作到A的總數量
X ~ B(1,p)
Y = X1+X2+....+Xn
然後我該怎麼做呢 怎麼樣才能跟普瓦松扯上關係!?
答案↓
y -(入P)
(入p) e
f (y) = -------------- y = 0,1,2,...
Y y!
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※ 編輯: lai90043 來自: 220.129.39.219 (07/11 23:16)