Applying the Permutations Formula

00:00 3 marks

Given 7 distinct books, how many ways can you arrange 4 of them on a shelf? Use the permutations formula $nPr = \frac{n!}{(n-r)!}$.

Hint Hint

Hint

Recall the formula for permutations $nPr = \frac{n!}{(n-r)!}$ where $n = 7$ and $r = 4$.

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Answer Answer

Complete Answer

840

Mark Scheme Mark Scheme

Answer Explanation Answer Explanation

Examiner Tips Examiner Tips

Common Errors Common Errors

Focus Focus

Formula Booklet

Math Editor

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