78 The owner of an automobile repair shop knows that the probabilities of and 4 requests for towing services are 0.19, 0.38, 0.15, and 0.05 per day.

4.78 The owner of an automobile repair shop knows that the probabilities of and 4 requests for towing services are 0.19, 0.38, 0.23. 0.15, and 0.05 per day. How many requests for towing services can the owner expect on a given d ay? 4 70