Hi

Note: The probability of x successes in n trials is: 

P = nCx*  where p and q are the probabilities of success and failure respectively. 

In this case let p(defective) = 4/30 = 2/15 & q = 7/15

nCx = 

P(3 chosen are all defective) = (2/15)^3 = .0024 

RELATED QUESTIONS

In a shipment of 40 televisions, 3 are defective. If 2 television sets are randomly... (answered by sudhanshu_kmr)

In a shipment of 50 televisions, 5 are defective. If 2 television sets are randomly... (answered by brucewill)

In a shipment of 30 televisions, 4 are defective. If 2 sets are randomly selected and... (answered by scott8148)

In a shipment of 40 televisions, 3 are defective. If 2 sets are randomly selected and... (answered by stanbon)

6/ a poll states that 30% of the workers in a large company have new desk, If 4 workers... (answered by jorel1380)

You just received a shipment of 12 televisions. 4 of the televisions are defective. If 2... (answered by Big Poop)

In a shipment of 100 televisions, six are defective.  If a person buys two TVs from that... (answered by edjones)

Suppose you just received a shipment of 8 televisions. 3 of which are defective. If 2... (answered by stanbon)

In a shipment of 100 televisions, 6 are defective. If a person buys two televisions from... (answered by edjones)