The water company in Enterprise found that 70% of its custom…

The water company in Enterprise found that 70% of its customers pay their monthly bill in full. Assuming customers pay independently, suppose 2 customers are chosen at random from a list of all the customers. What is the probability that both customers will pay their monthly bill in full? 

Suppose a roll of plastic-coated wire contains an average of…

Suppose a roll of plastic-coated wire contains an average of 0.8 flaws per every 4-meter length of wire. A QA engineer samples an 4-meter length of the wire and will accept the product if it contains zero flaws. What is the probability that the product will be accepted?   

The pre-cooked weight of hamburgers at Krusty Burger is norm…

The pre-cooked weight of hamburgers at Krusty Burger is normally distributed with a population mean of 5.5 ounces and standard deviation of 0.15 ounces. If you walk into Krusty Burger and order a burger, what is the probability that the pre-cooked weight of the burger you just ordered is less than 5.3 ounces?