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Determine the number of selections possible if at least one member is taken from each year-group.
Mathematics 9709 · AS & A Level · Sampling and estimation
Sampling and estimation — practice question
A school club contains members from $3$ year-groups: Year $1$, Year $2$ and Year $3$. There are $7$ members in Year $1$, $2$ members in Year $2$ and $2$ members in Year $3$. Five members of the club are chosen.
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This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “A correct unsimplified product of combinations with $3$ factors” …
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