CAIE S2 2021 November — Question 2

Exam BoardCAIE
ModuleS2 (Statistics 2)
Year2021
SessionNovember
TopicApproximating the Poisson to the Normal distribution
TypeSimple probability using normal approximation

2 The number of enquiries received per day at a customer service desk has a Poisson distribution with mean 45.2. If more than 60 enquiries are received in a day, the customer service desk cannot deal with them all. Use a suitable approximating distribution to find the probability that, on a randomly chosen day, the customer service desk cannot deal with all the enquiries that are received.