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Logic ★★★

Section 1: Comparing Sizes

Practice injections, surjections, bijections, and the cinema-seat model for comparing sets.

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Question 1 / 5

In the cinema model, everyone sits, no two people share a seat, and some seats remain empty. What kind of function from people to seats is described?

Surjective but not injective. Injective but not surjective. Neither injective nor surjective. Bijective.

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