Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

(a(i))[1]

Determine how many distinct arrangements can be formed using all 10 letters of WALLFLOWER when no restrictions are imposed.

(a(ii))[4]

Determine how many distinct arrangements can be formed using all 10 letters of WALLFLOWER when there are exactly six letters between the two Ws.

(b)[4]

A team of 6 people is to be selected from 5 swimmers, 7 athletes and 4 cyclists. There has to be at least 1 from each activity, and the number of athletes must exceed the number of cyclists. Find the number of different ways the team can be chosen.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: Correct exact value: $\frac{10!}{2!3!}=302400$

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