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OpenStudy (anonymous):
1. How many one-to-one correspondences are there between the sets {a, b, c, d} and {1, 2, 3, 4} if in each correspondence: a) b must correspond to 3? b) b must correspond to 3 and d to 4? c) a and c must correspond to even numbers? *Note: List all of the correspondences for each problem (i.e. b → 3, a → 1, etc.)
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