Question 1193175
Poisson distribution events are proportional to time
so 7.1/267=lambda/70, so lambda is 70*7.1/267=1.86 buildings in 7.1 days
p(0)=e^(-1.86)=0.1557
p(1)=e^(-1.86)*1.86^1/1!=0.2896
P(>=2) is 1-0.2896-0.1557=0.5547
-
93 days
lambda is 2.47
p(0)=e^(-2.47)=0.0846
p(2)=e*(-2.47)*2.47^2/2!=0.5160
p(1)=0.0846*2.47=0.2089
p(>=3)= 1- the sum above=0.1905