Mathematics, 10.12.2019 02:31 ellamai10123

Find the number of elements in a 1 ∪ a 2 ∪ a 3 if there are 200 elements in a 1 , 1000 in a 2 , and 5, 000 in a 3 if (a) a 1 ⊆ a 2 and a 2 ⊆ a 3 . (b) the sets are pairwise disjoint. (c) there are two elements in common to each pair of sets and one element in all three sets.

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Find the number of elements in a 1 ∪ a 2 ∪ a 3 if there are 200 elements in a 1 , 1000 in a 2 , and...