Current location - Training Enrollment Network - Mathematics courses - What's the difference between choosing two c42 and c4 1×c3 1 from four people in mathematical permutation and combination? I will. Come on! Please be clear!
What's the difference between choosing two c42 and c4 1×c3 1 from four people in mathematical permutation and combination? I will. Come on! Please be clear!
Your question should be C43×3! Ok, the three candidates for four are the combination problem, and the three positions are the arrangement problem of three people.
When you ask about the difference between C4 1×C3 1 and C42, it is actually the difference between permutation and combination. At C42, there is no difference in the order between them, but C4 1×C3 1 has the possibility of inheritance.