Solve the problem.
-A survey of senior citizens at a doctor's office shows that 53% of the seniors take blood pressure lowering medication and 47% take cholesterol lowering medication. 6% take both medications. What is the probability that a senior citizen takes only one of these medications given that he or she takes at least one of the medications?
A)0.53
B)0.47
C)-0.060
D)0.940

Question

Quizplus · Accepted Answer

The probability that a senior citizen takes only one of these medications given that he or she takes at least one of the medications can be found by subtracting the probability of taking both medications from the total probability of taking either medication. The total probability of taking either medication is the sum of the probabilities of taking each medication minus the probability of taking both (to avoid double counting), which is 0.53 + 0.47 - 0.06 = 0.94 or 94%.

Solve the Problem. -A Survey of Senior Citizens at a Doctor's Office Shows