In how many ways can a chairperson, a secretary and a treasurer be chosen from 6 club members if no member holds two posts?

Answer and explanation

Correct answer: A.

  1. Step 1: The posts are different, so order matters: .
  2. Step 2: .
Answer
.
Why not the others: : order was ignored, which gives combinations. : repetition was allowed, so one member could hold every post. : all the members were arranged, not just the ones holding posts.

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