2020 Jan

Question 3

(b) Suppose on every working day of the week (i.e. a weekday from Monday to

Friday), a supplier A sends a batch of components to a particular inspection

station. Similarly, two days a week, a batch also arrives from supplier B.

Given that 80% of all supplier A's batches pass inspection and 90 % of supplier

B's batches pass the inspection process. On a randomly selected day, compute

the probability that two batches pass inspection.