Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

Nine cards, all in different colours, are to be placed in a straight line. The $9$ cards include a pink card and a green card.
(i)[1]

How many distinct arrangements of the $9$ cards can be made?

(ii)[3]

How many different arrangements are there that do not place the pink card next to the green card?

(iii)[2]

Take every possible selection of $3$ cards from the $9$ cards, with the $3$ cards arranged in a straight line. What is the total number of different arrangements of $3$ cards?

(iv)[2]

How many of the arrangements of $3$ cards in part (iii) include the pink card?

(v)[2]

How many of the arrangements of $3$ cards in part (iii) do not put the pink card next to the green card?

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