Question: An ice cream parlor is doing a statistical study to find out during how many days of the month of April the highest temperatures will

An ice cream parlor is doing a statistical study to find out during how many days of the month of April the highest temperatures will be and prepare to cover the eventual demand. It is known that the temperature of the month of April in the city of Lima, always taken at noon, has a mean of 36C and a standard deviation of 3C. How many days in April are expected to have a temperature between 39C and 42C?

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