SOLUTION: The average weekly rent for flats is $250. Suppose the rents are normally distributed with a standard deviation of $40. What is the probability that a randomly chosen flat rents fo

Question 1121795: The average weekly rent for flats is $250. Suppose the rents are normally distributed with a standard deviation of $40. What is the probability that a randomly chosen flat rents for between $220 and $320 per week?
Give your answer to 3 decimal places.
Thank you so much in advance
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
For the first, (220-250)/40 or -0.75
For the second, (320-250)/40 or +1.75
Probability z is between -0.75 and +1.75 is 0.733
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