a)
X = the number of accidents occurring in a city in a day.
(i) Find the probability that on a randomly selected day there are no accidents
"1\\ day=>\\lambda=0.8"
(ii) Find the probability that on a randomly selected day there are accidents
b)
X = the number of diseased workers.
Binomial distribution
Given that "n=5,p=0.25."
Find the probability that out of 5 workers, at the most two contract that disease
"=\\binom{5}{0}0.25^0(1-0.25)^{5-0}+\\binom{5}{1}0.25^1(1-0.25)^{5-1}+"
"+\\binom{5}{2}0.25^2(1-0.25)^{5-2}="
"=0.75^5+5(0.25)(0.75)^4+10(0.25)^2(0.75)^3="
"=0.2373046875+0.3955078125+0.263671875="
"=0.896974375"
The probability that out of 5 workers, at the most two contract that disease is "0.896974375"
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