If n(A)=109, n(AandB)=156, and n(AorB)=44, find n(B)

Use the given information to find the indicated probability
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This is not a probability problem, because probabilities cannot exceed 1 (100%). A and B are sets.

n(A or B)=n(A)+n(B)-n(A and B),

44=109+n(B)-156=n(B)-47,

91=n(B).

So n(B)=91.

by Top Rated User (1.2m points)

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