Experimental studies utilize blinding to prevent researchers from biasing their measurements of the patients. But can they guess the treatment? In a study of a drug intervention, clinicians who were "blinded" were asked to guess what treatment their patients received. Data from that experiment are shown below. Assume that these data are indicative of the population of these treatments. 
a)If a subject is selected at random, what is the probability that the researcher correctly guesses the treatment?
b)If a randomly chosen subject received the standard treatment, what is the probability that the researcher correctly guesses the treatment?
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