Expert Answers

An illustration of the letter 'A' in a speech bubbles

Again, this is a strange question.  In the case of permutations, the order matters.  So, AB is different from BA.

However, in this case, it is asking how many permutations of 1 letter are there in a total of 6 letters.

Of course, there are 6.

Approved by eNotes Editorial Team

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial