Answer:
23.9% probabiitiy of randomly selecting a person who has hearing problems or vision problems.
Explanation:
We have these following probabilities:
0.155 = 15.5% probability that a randomly selected person has hearing problems.
0.084 = 8.4% probabiity that a randomly selected person has vision problems.
Can we compute the probabiitiy of randomly selecting a person who has hearing problems or vision problems by adding these probabilities
These probabilities are independent(a person having hearing problems is independent from having vision problems), which means that we can add these probabilities.
15.5 + 8.4 = 23.9%
23.9% probabiitiy of randomly selecting a person who has hearing problems or vision problems.