Two inspectors A and B independently inspected the same lot

Two inspectors A and B independently inspected the same lot of items. Four percent of the items are actually defective. The results turn out to be as follows:

5% of the items are called defective by A.

6% of the items are called defective by B.

2% of the items are correctly called defective by A.

3% of the items are correctly called defective by B.

4% of the items are called defective by both A and B.

1% of the items are correctly called defective by both A and B.

Solution