Question

Flaws in a carpet tend to occur randomly and independently at a rate of one every 200 square feet. What is the probability that a carpet that is 8 feet by 10 feet contains no flaws?

Answer 1

Let X = # errors per 80 sq feet.
X~Poisson(8/22).
so
P( X = 0 ) = e^(-8/22) = 0.8187
hope it helps