Question 3 ( 7marks) Unemployment rate in a certain city stands at 30%. If a random sample of 10 residents in this city is selected. 7 marks Required: A.What is the probability that we get one unemployed person? (2 marks) n! X 1-X P(X = x) = xp*q"-* x!(n - x) ANSWER: B.What is the probability that we get at most two unemployed residents? (3 marks) ANSWER: C.Find the mean and variance. (2 marks)