SOLUTION: Heres the problem: Over 500 million tweets are sent per day. Assume that the number of tweets per hour follows a Poisson distribution and that Bob receives on average 7 tweets duri

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Question 1125139: Heres the problem: Over 500 million tweets are sent per day. Assume that the number of tweets per hour follows a Poisson distribution and that Bob receives on average 7 tweets during his lunch hour.
-What is the expected number of tweets Bob receives during the first 30 minutes of his lunch hour?
I have tried everything, and I may just not be setting this up the right way, if you could help me with a formula and how to input the values into that formula as well.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
Number of tweets are considered proportional to time, so if he gets 7 per hour, the expected number in 30 minutes should be 3.5
The 500 million has to do with "infinite" and the theoretical possibility of receiving an infinite number, which is when the Poisson distribution should be used.