The Canada Urban Transit Association has reported that the average revenue per passenger trip during a given year was $1.55. If we assume a normal distribution and a standard deviation of = $0.20.

a. The proportion of passenger trips that produced revenue of less than $1.55 is .

b. The proportion of passenger trips that produced revenue of between $1.15 and $1.95 is .

c. The proportion of passenger trips that produced revenue of between $1.35 and $1.75 is .

d. The proportion of passenger trips that produced revenue of between $0.95 and $1.55 is ____________.

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