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A Bank Offers Online Banking to Its Customers Free of Charge

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A bank offers online banking to its customers free of charge. While online, customers can also sign up for additional services that the bank offers. Let x be the number of customers who sign up for additional services online each day. Suppose the distribution of x is approximated well by a Poisson distribution with mean λ = 42.3. Find E(x) and interpret its value.


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