Section 4.4 Homework

2. Which of the following is NOT a requirement of the Permutations​ Rule,

for items that are all​ different?

Choose the correct answer below.

1. Order is taken into account​ (rearrangements of the same items are considered to be​ different).
2. There are n different items available.
3. Exactly r of the n items are selected​ (without replacement).
4. Order is not taken into account​ (rearrangements of the same items are considered to be the​ same)