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Transcription of this question: [Maximum mark: 8]Students sign up at a desk for an activity during the course of an afternoon. The arrival ofeach student is independent of the arrival of any other student and the number of studentsarriving per hour can be modelled as a Poisson distribution with a mean of ;The desk is open for 4 hours. If exactly 5 people arrive to sign up for the activity during thattime find the probability that exactly 3 of them arrived during the first hour.

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