Problem 192 of 7
Correct the permutations/combinations probability error: A student uses combinations to find the number of ways to arrange 5 distinct books on a shelf.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
catch order-matters confusion, restriction mistakes, and denominator errors.
Hidden until you reveal it.
Correction must fix order-matters, denominator, repeated, or at-least-one confusion.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. Identify whether order matters and what event is requested.
2. Choose the matching counting formula.
3. Correct numerator and denominator consistently.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Only replacing a number without explaining the counting issue.