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sol59
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Homework Statement
On average, 2 students per hour come into the class. What is the probability that the time between two consecutive arrivals is in the interval <10 minutes; 50 minutes>.
Homework Equations
p(k)=P(Y=k)=((lambda*t)k*(e-lambda*t)/k!
The Attempt at a Solution
I've tried using the Poisson distribution with k=2 t=40/60=2/3 and lambda=4/3 but the result is wrong. Thanks for helping!