A recent survey reported that $18\%$ of adults can correctly identify a recycling symbol that indicates "plastic type $\#2$."

What is the probability of randomly selecting an adult who cannot identify the symbol correctly?

An inspection report reveals that $20\%$ of portable power banks produced in a certain factory do not meet safety standards. A quality analyst needs at least one defective unit for further testing. If the analyst randomly selects $15$ power banks from a larger batch, what is the probability that at least one of them is defective? Is this probability high enough for the analyst to reasonably expect at least one defective item?

In a workplace survey, employees were asked whether they prefer working remotely or working on-site. The results are shown below:

Let $Y$ be the event of randomly selecting a person who is a younger employee. State the meaning of $\bar{Y}$ and find the value of $P\left(\bar{Y}\right)$.

The table below shows the age distribution of the population of Maple City. What is the probability that a randomly chosen person is not younger than $30$ years old?