There are `20%` chances for a worker of an industry to suffer from an occupational disease, `50` workers were selected at random and examined for the occupational disease. Find the probability that :
(i) only one worker is found suffering from the disease
(ii) more than `3` are suffering from the disease and
(iii) none is suffering from the disease .

Answer

(i) `10((14)/(5))^(49)`
(ii) `1-(4^(47))/(50)xx25364`
(iv) `((4)/(5))^(50)`