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n(A) = 40, n(B) = 50, n(A ∪ B) = 71 and n(A ∪ B)' = 0. Find n(A ∩ B).
n(A ∩ B') = 15, n(A' ∩ B) = 20. Find n(A ∩ B).
In a university, out of 1000 students 150 offered maths only. 120 offered statistics only, 80 offered physics and maths, 200 offered physics and maths, 100 offered maths and statistics, 650 offered physics, by using venn diagram, find the number of the students who:
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