If n(A ∩ C) = 195 and n(A ∩ B ∩ C) = 90 what is n(A ∩ BC ∩ C)?

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A: The formula of the combination is given by: Crn=n!r!  n-r!

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A: We will find out the required value.

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Q: n(A) = 104, n(A ∪ B) = 144, and n(A ∩ B) = 45, find n(B).

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