# UE Stochastic Processes - Beispiel 35

From StatWiki

Customers arrive at a bank according to a Poisson process at a mean rate of per minute. A proportion 0.6 wish to draw out money (type A), 0.3 wish to pay in money (type B) and 0.1 wish to do something else (type C).

Wegen UE Stochastic Processes - Beispiel 31

(a) If twenty customers arrive in two minutes, what is the probability that just one is of type C?

(b) How much time must elapse before at least one customer each of type A and B will have arrived with a probability of 0.9.?

Engine.php: unknown value "raw" for attribute "output"in

- polyroot always returns complex
erg=Re(polyroot(c(-0.1,1,1,-1)))

erg

log(erg)/-3

Weil und , muss sein.