The probability of the number of defective circuit boards in a shipment is given in the tables for two different companies.

Company A

A 5-column table has 2 labeled rows. The first row is labeled Number defective (x) with entries 0, 1, 2, 3. The second row is labeled P (x i) with entries 0.21, 0.30, 0.41, 0.08.

Company B

A 5-column table has 2 labeled rows. The first row is labeled Number defective (x) with entries 0, 1, 2, 3. The second row is labeled P (x i) with entries 0.18, 0.32, 0.28, 0.22.

What is the expected number of defective circuit boards for company A?

What is the expected number of defective circuit boards for company B?

Which company should be chosen for purchasing circuit boards? Explain.