there are 4 districts and 9 individuals available to carry out the survey. Assuming that no one surveys more than one district and each district is surveyed once, how many different assignments of survey takers to districts are possible?
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there are 4 districts and 9 individuals available to carry out the survey. Assuming that no one surveys more than one district and each district is surveyed once, how many different assignments of survey takers to districts are possible?
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