Problem 42 of 7
Decide whether the counting problem uses permutation or combination: choose 2 representatives from a class of 30 students.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
determine whether order matters.
Hidden until you reveal it.
Method choice must be justified by whether order changes the outcome.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Identify what counts as one outcome.
2. Ask whether rearranging the same selected items creates a new outcome.
3. Choose permutation if yes and combination if no.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Choosing by keyword alone without considering context.