SOLUTION: in a certain district, the chance of getting influenza is 0.01 among adults and 0.1 among seniors and children. it is known that 90% of the population are adults. determine (i)the

Algebra ->  Probability-and-statistics -> SOLUTION: in a certain district, the chance of getting influenza is 0.01 among adults and 0.1 among seniors and children. it is known that 90% of the population are adults. determine (i)the       Log On


   



Question 930911: in a certain district, the chance of getting influenza is 0.01 among adults and 0.1 among seniors and children. it is known that 90% of the population are adults. determine (i)the probability that a randomly selected person is infected,and (ii)given that a person is infected, the conditional probability that he/she is an adult.
Answer by ewatrrr(24785) About Me  (Show Source):
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p(adult/flu) = .01, p(SR & children / flu) = .10
..........
90% of population Adults
......
a randomly selected person
P(infected) = .90%2A.01+%2B+.10%2A.10 = .019
P(inf |adult) = %28.90%2A.01%29%2F.90 = .009