Poisson Distribution Formula
Poisson distribution is actually another probability distribution formula. As per binomial distribution, we won’t be given the number of trials or the probability of success on a certain trail. The average number of successes will be given in a certain time interval. The average number of successes is called “Lambda” and denoted by the symbol “λ”.
The formula for Poisson Distribution formula is given below:
x is a Poisson random variable.
e is the base of logarithm and e = 2.71828 (approx).
Question: As only 3 students came to attend the class today, find the probability for exactly 4 students to attend the classes tomorrow.
Average rate of value(
Poisson random variable(x) = 4
Poisson distribution = P(X = x) =