A large chain retailer purchases certain kind of electric device from manufacturer.The manufacturer indicates that the defective rate of the device is 3%.The inspector of the retailer picks 20 items from a shipment.What is the probability that the store will receive atmost one defective item?

Lot of 100 items contains 10 defective items.Five itwms are selected at random from the lot and sent to the retail store.What is the probability that the store will receive at most one defective item?

There are 5% defective items in a large bulk of items.What is the probability that a sample of 10 items will include not more than one defective item?

A company produces 10,000 items per day. On a particular day 2500 items were produced on machine A, 3500 on machine B and 4000 on machine C. The probability that an item produced by the machines. A, B, C to be defective is respectively 2%, 3% and 5 %. If one item is selected at random from the output and is found to be defective, then the probability that it was produced by machine C, is