## Elementary Statistics (12th Edition)

a) Here, $mean=\frac{268}{41}=6.54.$ b)$P(X\geq1)=1-P(X=0)=1-\frac{6.54^0\cdot e^{-6.54}}{0!}=1-0.0014=0.9986.$ c)The probability of 0 earthquake is really low (you can see it in b)) theerefore it is very unlikely.