SMT shopping mall has a single sale counter and, customers arrive according to Poisson probability distribution. The time required to pay the goods customers follows an exponential probability distribution. The mean arrival rate is 12 customers per hour, and the mean service rate is 18 customers per hour. What is the probability that an arriving customer will have to wait for pay? on O a. 0.43 b.0.67

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.