# UE Stochastic Processes - Beispiel 34

From StatWiki

In an office telephone messages arrive according to a Poisson process at the mean rate of six per hour and fax messages at three per hour.

(a) Find the probability that exactly two messages (phone or fax) are received between 9.00 and 9.40.

Suchen

(b) Find the probability that the first message after 10.00 occurs before 10.10.