The number of contaminants in samples of one cubic centimetre ofpolluted water has a Poisson distribution with a mean of 1.
a. What is the probability a sample will contain some (one ormore) contaminants?
b. If four samples are independently selected from this water,find the probability that at least one sample will contain some(one or more) contaminants?
c. If 100 samples are selected instead, what is approximatelythe probability of seeing at least 60 samples with a contaminant?(Use the Normal table provided for your calculations)
