



 
Hi Cookie, I agree with your answer to part a). You can use the same technique to find the probability that the attendance is between 45,000 and 50,000. First find the probability that the attendance exceeds 45,000
and then subtract the probability that the attendance exceeds 50,000.
(the units on the horizontal axis in the diagrams are in thousands of attendees.) If it bothers you to work to the left of the mean you can use the symmetry in the diagram to see that
and hence find the answer to b) by subtracting from the probability that the attendance is greater than 65,000 from your answer to part a). Penny  


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