Mathematics, 19.10.2019 01:10 grace9874
Let a and b be subsets of a universal set u and suppose n(u) = 400, n(a) = 115, n(b) = 90, and n(a ∩ b) = 50. find the number of elements in the set.
Answers: 2
, which means there are 400 - 155 = 245 elements not accounted for by 
, or
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Let a and b be subsets of a universal set u and suppose n(u) = 400, n(a) = 115, n(b) = 90, and n(a ∩...
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