Front-end interview-> logic reasoning questions

Yesterday, I went to a company named XX to interview js web Front-end development posts. I felt that the front-end technology was okay. The technical officer said, ask your logic reasoning, and I got the following two questions.

(PS: My answer is not good. The whole interview has been planted here, so it is estimated that the interview is yellow. Today, I went to the blog Park to verify it. Could you please give me your opinion and ask me this during the interview, what do you want to know and have something to do with my position? What is the answer to the following questions? How can this problem be analyzed? Or how can I answer the question in a better way ?)

(I come to verify the result. If I have the honor to be able to see it, I will also give my opinion)

(Logical reasoning is only a task in the Middle School and University era. I have graduated from college for more than two years. I have been coding every day and spent all my time in JS language or programming, these logical reasoning or questions about brain turns are basically not ~~)

1. Waiting for a car on the road. The probability of waiting for 30 minutes is 80%. What is the probability of waiting for the car in 10 minutes?

2. among a group of people, the probability of playing basketball is 85%, and the number of people who can play football is 75%. What is the maximum and minimum ratio of people who can play basketball + football with colleagues?