The number Beatles name on varies with an average of 13 per

The number Beatles name on varies with an average of 1.3 per square yard. What is the approximate probability of obtaining a sample of a square yard of lawn with at most one beetle?

Using a cumulative poisson distribution table or technology, matching

u = the mean number of successes =    1.3

x = the maximum number of successes =    1

Then the cumulative probability is

P(at most   1   ) =    0.626823124 [ANSWER]