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Give a formula for the number of elements in the union

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Reference no: EM131573895

Question: a) Give a formula for the number of elements in the union of four sets and explain why it is valid.

b) Suppose the sets A1, A2, A3, and A4 each contain 25 elements, the intersection of any two of these sets contains 5 elements, the intersection of any three of these sets contains 2 elements, and 1 element is in all four of the sets. How many elements are in the union of the four sets?

Reference no: EM131573895

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