Question

A market has two check out lines. Let X be the number of customers at the express checkout line at a particular time of day. Let Y denote the number of customers in the super-express line at the same time. The joint probability mass function of (X, Y) is given below. What is the probability of having only one customer at the express checkout line when there are more than two customers in the super-express line at the same time

Answer 1

The thaily are not really bad but it’s just that a little bit too big and then I can do that lol but I’m just going outside and I’m going on the road right thanks for