In a statistics class, there are 22 juniors and 18 seniors. Of the juniors, 12 are females. Of the seniors, 11 are males. What is the probability that a randomly selected student from the class is a male or a
junior?

Students are getting signatures for a petition to increase sports activities at the community center. the number of signatures they get each day is 3 times as many as the day before. the expression 3^6 represents the number of signatures they got on the sixth day. how many signatures did they get on the first day?