CAIE A Level Mathematics 9709 · Permutations and combinations

Permutations and combinations: calculation question

3 marksStandard

There are 7 people to line up in a row. Two of them, Ali and Bea, must stand together. How many different arrangements are possible?

  1. (a)

    Determine the number of arrangements.

    [3]

Work it out, then check it

Your working is checked step by step against the answer key, with method marks, units and carried-forward errors handled the way a mark scheme handles them.

Answer this and get it marked, free

Free account, no card. Three marked written answers a day on the free plan.

How this question is marked

3 marks. Method marks are awarded for correct working even if the final answer is wrong, and a later part can still score if it correctly uses an earlier wrong answer.

More Permutations and combinations questions

All Permutations and combinations questions

Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.