Answer:
Pr(X >= 11) = 0.33586800937
Explanation:
This scenario can be modeled by a binomial distribution model.
The probability of success, p = 0.82 is constant.
The are 12 independent trials.
We let the random variable X denote the number of adults who need correction for their eyesight. We are then to determine the probability that X is at least 11;
Pr(X=11 or 12) = Pr(X=11) + Pr(X=12)
= 0.33586800937
11 is significantly a high number of adults requiring eyesight correction.