SOLUTION: What is 7 permutation 3. And 7 combination 3??
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Question 300415
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What is 7 permutation 3. And 7 combination 3??
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checkley77(12844)
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7P3=7*6*5=210 ans.
7C3=7!/3!(7-3)!=5,040/6*4!=5,040/6*24=5,040/144=35 ans.