The following data lists the number of correct and wrong dosage amounts calculated by 30

30 physicians. In a researchexperiment, a group of 13

13 physicians was given bottles of epinephrine labeled with a concentration of"1 milligram in 1 millilitersolution," and another group of 17

17 physicians was given bottles labeled with a ratio of"1 milliliter of a1:1000 solution." If one of the physicians is randomlyselected, find the probability of getting one who made a correct dosage calculation or was given the bottle with a concentration label.