Question at position $32$

Customers arrive at a single self$-$serve coffee machine in a busy mall at the rate of $30$ per hour, following Poisson distribution. Each customer takes exactly $90$ seconds to get his or her coffee. What is the expected number of customers in queue at this coffee machine?

Question at position $33$

Consider a three sequentially stepped process named as Process A$,$ Process B$,$ and Process C$.$ Input comes into Process A$.$ Output from A goes into Process B$.$ Output from B goes into Process C$.$ Output of C is the final output. Suppose that it takes $2$ minutes per unit in Process A$,2$ minutes per unit in Process B and $1$ minute per unit in Process C$.$ What will be maximum steady state output from this system? $($Numeric value only.$)$

Question at position $34$

Which of the following is an analytical tool used in Six Sigma quality improvement programs?

Leadership

Pareto charts

Continuous improvement

Management by fact

Kaizen

Question at position $35$

A cost of quality classification is which of the following?

Prevention costs

Variable overhead

Direct labor

Inventory costs

Material costs