A packet of 10 CD's contains 4 defected. The CD's are selected at random one by one, examined and are not replaced. The probability that 7th CD is the last defective is

A packet of 10 CD's contains 4 defected.The CDl's are selected at random one by one, examined and are not replaced.The probability that 7 th CD is the last defective is

A consignment of 15 record players contains 4 defective. The record players are selected at random one by one and examined. The ones examined are not placed back. What is the probability that the 9^(th) one examined is the last defective.

A consignment of 15 record players contains 4 defectives.The record players are selected at random,one by one,and examined.The one is examined,are not put back.Then the probability that 9 th one examined is the last defective,is

A consignment of 15 record players contain 4 defectives. The record players are selected at random, one by one and examined. The one examined is not put back. Then : Find the Probability that 9^(th) one examined is the last defective is (8)/(195) .

Three items from a lot of 10 items are defective. if two items are selected randomly one by one without replacing then the probability that both are defective items.

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?