Hey chiro, sorry for my late reply (I've been really busy).
First and foremost thanks for your reply.
For question a:
λ = 1/4
X, Y -> λe-λt
X+Y = ((λt)^(2-1) / (2-1)!)* λe-λt
P(X+Y <7) = integral of 0 to infinity of (X+Y)
Is this what you meant?
For question b, can't I solve this by normal...
Hello forum,
I recently lost my notes on this matter, so I hope someone can fill in the gaps in my memory.
The problem I am working on is the following:
For one ticket window, the waiting time for one people satisfies an exponential distribution λe-λt and expected waiting time is 4 min...