Ashipment of 12 microwave ovens contains 3 defective units. a vending company has ordered 4 of these units, and because all are packaged identically, the selection will be at random. what is the probability that at least 2 units are good?

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!