Probability using Poisson Distribution

[FourierX]

Homework Statement

Suppose a typographical errors committed by a typesetter occurs randomly. If that a book of 600 pages contains 600 such errors, calculate the probability by using Poisson's distribution.
i) that a page contains no errors
ii) that a page contains at least three errors

Homework Equations

W(n) = $$\lambda$$ⁿ e ^-$$\lambda$$ / n!

The Attempt at a Solution

I related $$\lambda$$ = Np, the mean number of errors and proceeded. I am supposed to get 0.37 for part i) of the problem but I didn't get it right. Any suggestion?


Berkeley

 

[Mark44]

Isn't lambda the mean number of errors per page? If so, it would be 1. Using the formula, W(0) = 1^0 * e^(-1)/0! = 1/e ~ .37