Complaints about an Internet brokerage firm occur at a rate of 4 per day. The number of complaints appears to be Poisson distributed. A. Find the probability that the firm receives 5 or more...

Complaints about an Internet brokerage firm occur at a rate of 4 per day. The number of complaints appears to be Poisson distributed.

A. Find the probability that the firm receives 5 or more complaints in a day.

Probability =

B. Find the probability that the firm receives 20 or more complaints in a 4-day period.

Probability =