Mathematics 9709 · AS & A Level · Permutations and combinations

Permutations and combinations — practice question

(a)[2]

How many distinct arrangements are possible for the 9 letters in TELESCOPE?

(b)[4]

How many distinct arrangements of the 9 letters in TELESCOPE have exactly two letters between T and C?

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Arrangement expression $\frac{9!}{3!}$” …