Suppose you just received a shipment of ten televisions. two of the televisions are defective. if two televisions are randomly selected, compute the probability that both televisions work. what is the probability at least one of the two televisions does not work?

Try this solution:

1. for probability of both televisions work:

2. for probability of at least on is defective (it means, the sum = one is defective and two are defective):

- for P(1defective);

- for P(2defective);

totaly for at least one is defective:

∞ this is your sign