SOLUTION: Suppose Set A contains 87 elements and Set B contains 30 elements. If Sets A and B have 21 elements in common, what is the total number elements in either Set A or Set B.

Question 856309: Suppose Set A contains 87 elements and Set B contains 30 elements. If Sets A and B have 21 elements in common, what is the total number elements in either Set A or Set B.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Suppose Set A contains 87 elements and Set B contains 30 elements. If Sets A and B have 21 elements in common, what is the total number elements in either Set A or Set B.
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#(A or B) = #(A) + #(B) - #(A and B)
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#(A or B) = 87 + 30 - 21 = 96
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Cheers,
Stan H.
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