At a self-service gas station, 39% of the customers pump regular gas, 39% pump midgrade gas, and 22% pump premium gas. Of those who pump regular, 31% pay at least $30. Of those who pump midgrade, 54% pay at least $30. And of those who pump premium, 68% pay at least $30.
What is the probability (±0.001) that the next customer pays at least $30?
What percent of customers who pay at least $30 pump premium? % (Round your answer to the nearest whole number.)