At a rural clinic in southern Georgia, 30% of patients have been diagnosed with osteoarthritis, 55% of patients have been diagnosed with...

1.    At a rural clinic in southern Georgia, 30% of patients have been diagnosed with osteoarthritis, 55% of patients have been diagnosed with hypertension, and 15% carry both diagnoses. What is the probability that a patient at this clinic has been diagnosed with osteoarthritis OR hypertension?

15%

b.    70%

55%

40%

85%