Please like ud83dudc4d Please upvote ud83dudc4d Please like ud83dudc4d   Given,   Average of cars in the system ( L ) = 3 cars   Car arrive at taxi at average ( λ ) = 4minutes = 60/4 = 15 cars/hour   The service rate (μ) is given by   μ = λ(1+L)/L   μ = 15(1+3)/3   μ = 20   ... See the full answer