The solomon, smith, and samson law firm produces many legal documents that must be word processed for clients and the firm. Requests average 6 pages of documents per hour, an they arrive according to a poison distribution. The secretary can word process 8 pages per hour on average according to an exponential distribution.
a. The average utilization of the secretary is 75 % correct!
b. the probability that more than four pages are waiting or being word processed is ____