railfall in Brookings county is normally distributed. if the average number of inches in a year is 22.5, with a standard diviation of 3, what is the probobility that the country gets less than 20 inches of rainfall in a year
Added by Katherine P.
Step 1
Let X = yearly rainfall (in inches). X ~ Normal(μ = 22.5, σ = 3). We want P(X < 20). Show more…
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