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Probability of Random Selection
1. A ball is randomly selected from a jar containing 70 red balls, 20 green balls, and 10 blue balls. What is the probability that a non-red ball is chosen?

2. The students in the 12-member advanced communications design class at Center City Community College are submitting a project to a national competition. They must select a 4-member team to attend the competition. The team must have a team leader and a main presenter; the other 2 members have no particularly defined roles. In how many different ways can this team be formed?

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