A factory produces 500 units of product A per day and 300 units of product B per day. Product A has a defect rate of 2% and product B has a defect rate of 5%. What is the overall defect rate for both products combined?
First, let's find out how many defective units are produced for each product:

Defective units of product A = Total units of product A * Defect rate of product A
                                            = 500 * 0.02
                                            = 10

Defective units of product B = Total units of product B * Defect rate of product B
                                            = 300 * 0.05
                                            = 15

Now, we'll add up the total number of defective units and divide by the total number of units produced for both products:

Total defective units = Defective units of product A + Defective units of product B
                                  = 10 + 15
                                  = 25

Total units produced = Total units of product A + Total units of product B
                             = 500 + 300
                             = 800

Overall defect rate = (Total defective units / Total units produced) * 100
                              = (25 / 800) * 100
                              ≈ 3.125%

So, the overall defect rate for both products combined is approximately 3.125%.