The mean wind speed in San Francisco is 13.6 mph in July, ac…

The mean wind speed in San Francisco is 13.6 mph in July, according to the U.S. National Oceanic and Atmospheric Administration.  Suppose that the distribution of wind speed in July in San Francisco is normal with a mean of 13.6 mph and standard deviation of 6 mph.  Find the probability that a randomly chosen day in July has a wind speed between 15 and 20 mph.  Round your answer to two decimal places.    

A company observed the next 100 purchases to help determine…

A company observed the next 100 purchases to help determine if they should give their regular customers preferential rates with same-day shipping.  The results of the survey is in the table below:     a.  Suppose you select one survey response, what is the probability the survey was conducted to a customer who is not a regular customer?  Round your answer to two decimal places.    b.  Suppose you select one survey response, what is the probability the survey was conducted to a regular customer or the customer selected same-day shipping?  Round your answer to two decimal places.    c.  Suppose you select one survey response, what is the probability the customer selected same-day shipping given that they were a regular customer?  Round your answer to two decimal places.