DVD players are shipped to a supplier in batches of ten Supp

DVD players are shipped to a supplier in batches of ten. Suppose that 90% of all such batches contain no defective players, 9% contain one defective player, and 1% contain two defectiv players. Two DVD players from a batch are randomly selected and tested. What is the probability that there are 2 defective players in the batch given that one of the two tested players is defective?