Consider there are three products in your store A, B and C. C gets a discount only if customer buys 2 from product A and 2 from Product B.

Step-1 : General tab

Give the basic details of your discount rule and choose **Dependent product based discount **as your discount method.

Step-2 : Condition tab

The following each product should have quantity 2 to get discount 30% for Product C = Mugs.

Product A = Clock

Product B = Mirror

So the condition should be like

Buy = Each - Equal - 2

Product(s) from = Clock, Mirror

Get discount in = Mugs

Step-3 : Discount tab

Choose discount type - Percent and set the discount value - 30

Save the rule.

Step-4 : Frontend demo