3. Suppose it is known from large amounts of historical data that X, the number of cars that arrive at a specific intersection during a 20-second time period, is characterized by the following discrete probability function: 6x f(x) = e-6, for x = 0,1,2,... x!

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I need help finding the probability that only two cars arrive. 

3. Suppose it is known from large amounts of historical data that X, the number of cars that arrive at a
specific intersection during a 20-second time period, is characterized by the following discrete probability
function:
6x
f(x) = e-6!
x!
, for x = 0,1,2,...
Transcribed Image Text:3. Suppose it is known from large amounts of historical data that X, the number of cars that arrive at a specific intersection during a 20-second time period, is characterized by the following discrete probability function: 6x f(x) = e-6! x! , for x = 0,1,2,...
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