A multinational company has the following single sampling plan which it has been using for years: n=25 and c=2. Suppose that the firm would like to accept all lots which are no more than 2.5% defective (or AQL=2.5%). What will be the producer's risk with lots of size 150 of which 2% are defective?

Can you show me the solution? The correct answer is 0.0042.