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Consider relation R in the following E/R diagram. If E1 has 3 entities, E2 has 4 entities, and E3 has 5 entities, what is the

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Consider relation R in the following E/R diagram. If E1 has 3 entities, E2 has 4 entities, and E3 has 5 entities, what is the MAXIMUM number of tuples of R? E2 R E1 E3 Select one: 60 3 20 12 15

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