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A review of the sales records for Kim’s Karwash indicates that daily revenue can be represented...

A review of the sales records for Kim’s Karwash indicates that daily revenue can be represented by a normal distribution with mean of $2000 and standard deviation of $400. a. What is the probability that tomorrow’s profit will be greater than $2500? (Be sure to indicate the relevant Z-score(s) for the problem).

B. What is the probability that profits fall between $1700 and $2300? (Be sure to indicate the relevant Z-score(s) for the problem).

c. Suppose one day’s revenue is independent from every other day.   What is the probability that that daily revenue exceeds $2400 two days in a row?

math   Statistics-And-Probability   
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