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 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? 

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?