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toothpaste666
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Homework Statement
A telephone operator receives four phone calls in three minutes on the average. Let a Poisson random number X denote the number of phone calls per minute to this operator.
(a) Find the probability that this operator receives two phone calls in a minute.
(b) Find the probability that this operator receives at least two phone calls in a minute.
The Attempt at a Solution
a) lamba = (4/3)(1) = (4/3) x = 2
f(2, 4/3) = (4/3)^2 e^(-4/3)/ 2!
b) 1- [ f(0, 4/3) + f(1,4/3)]
I just want to make sure these will give me the correct answer because I must rely on the formula for the test. thank you