Provide a solution showing your calculations and submit your work for marking. Include a sketch as part of your complete solution. P(X > 20) = EUse the Central Limit Theorem to nd the probability of the indicated event, assuming that the distribution of the population data is unknown. In a certain city, employees work an average of 18.9 hours of overtime every month, with a standard deviation of 18 hours. What is the probability that the average number of hours of overtime worked last month by a random sample of 140 employees in the city exceeds 20 hours