Can you explain?

Visit your local ibrary: On a recent Saturday, a total of' 1382 people Visited a local ibrary. Of these people. 240 were under age 10, 461 were aged 1018, 175. were aged 1930, and the rest were more than 30 years old. One person is sampled at random. [a] What is the probabity that. the person is less than 1'9 years old? [b] What is the probabity that the person is more than 30 years old? (a) What is the probabity'that the person is less than 19' years old? Round your'answer to four decimal places. The probabity that the person is less than '19" years old is D . [b] What is the probabity that the person is more than 30 years old? Round your answer to four dedmal places. 'The probabity that the person is more than 30' years old is