According to a University of Maryland Study of 200 Samples

Multiple Choice

According to a University of Maryland study of 200 samples of ground meats, the probability that one of the samples was contaminated by salmonella was 0.20. The probability that a salmonella-contaminated sample was contaminated by a strain resistant to at least one antibiotic was 0.86, and the probability that a salmonella-contaminated sample was contaminated by a strain resistant to at least three antibiotics was 0.54. Find the probability that a ground meat sample that was contaminated by an antibiotic-resistant strain was contaminated by a strain resistant to at least three antibiotics. Please round the answer to the nearest thousandth. ​

A) 0.528
B) 0.628
C) 0.627
D) 0.638
E) 0.630