8 customers per minute i.e 4 customers per 30 seconds
we need to find probability that 6 customers will arrive in 30 seconds
thus, we have
μ = 4
x = 6; since we want to find the likelihood that 6 people will
arrive.
e = 2.71828
and P(x) = (e^-μ)*(u^x) / x!
= (2.71828^-4)*(4^6)/6!
= 0.1
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