A big department store has two entrance doors, one on 5th Ave. and the other on 6th Ave. The number of shoppers who enter the store through the 5th Ave. door in an hour, X, has mean of μX = 25 and standard deviation σX = 5, and the number of shoppers who enter the store through the 6th Ave. door in an hour, Y, has a mean of μY = 35, and standard deviation of σY = 8. Let the random variable T be the total number of shoppers who enter the store in an hour.What is μT, the mean of T?30421060Assuming that shoppers enter the store through the two doors independently, what is σT, the standard deviation of T?1389sqrt(13), or the square root of 13sqrt(89), or the square root of 89

A national park has 2 entrance gates, one at the north end and a second gate at the south end of the park. Let X be the number of cars entering the North gate per hour and let Y be the number of cars entering the South gate per hour. Assume that X is random variable with mean μx = 23 and standard deviation σx = 3. Assume Y is a random variable with mean μy = 18 and standard deviation σy = 4. Assume that the two gates operate independently.What is the mean of Z, the total number of cars entering the park each hour?

A building has two elevators, an express elevator and a standard elevator. Let X be the number of passengers using the express elevator every hour, and let Y be the number of passengers using the standard elevator every hour. Assuming that μX = 55 and μY = 32, what is the mean of Z, the total number of passengers using the elevators each hour? 23 32 55 87

The Coff-E-Cup beverage company has opened two franchises in town. They put one location in the center of town and one at the west end of town. Let X be the number of customers that enter the center of town location in an hour, and Y be the number of customers that enter the location at the west end of town in an hour. Assuming that μX = 65 with σX = 4.3 and μY = 45 with σY = 3.2 , what is the mean of Z, the total number of customers that enter these locations in an hour?

Assuming that shoppers enter the store through the two doors independently, what is σT, the standard deviation of T?1389sqrt(13), or the square root of 13sqrt(89), or the square root of 89

The number of people in a car that crosses a certain bridge is represented by the random variable X, which has a mean value μX = 2.7, and a variance σ2X = 1.2. The toll on the bridge is $3.00 per car plus $0.50 per person in the car.What is the mean of the total amount of money that is collected from a car that crosses the bridge? Report your answer to two decimal places