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For each of the scenarios below, please indicate whether they involve a permutation or a combination
1) A team of 8 basketball players needs to choose a captain and co-captain.
2) Rob and Mary are planning trips to nine countries this year. There are 13 countries they would like to visit. They are deciding which countries to skip.
3) The batting order for seven players on a 12 person team.
4) There are 45 applicants for three Computer Programmer positions
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