There are 10 products, 7 genuine products and 3 defective products. Now take 1 product from them. What is the possibility of being a defective product?
有10件产品，7件正品，3件次品，现从中任取1件产品，是次品的可能性是多少
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>