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How many different ways are there to select 45 members if the club president and the club treasurer both must be included?
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
The club has 50 members altogether, and this total includes the club president and the club treasurer. Although every member wishes to join the coach tour, the coach has space for only 45 people.
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This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Combination written as a single term: $^{48}C_{43}$ or $^{48}C_{5}$ (or an equivalent form)” …
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