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How many different ways can a chairperson and an assistant chairperson be selected for a research project if there are 7 scientists available? which counting method do you use?
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Officer brimberry wrote 32 tickets for traffic violations last week, but only 4 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.
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How many different ways can a chairperson and an assistant chairperson be selected for a research pr...
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