Question

IF n(A)=60,n(AnB)=45 and n(A U B)=100,THENCALCULATE n(B).​

Answer 1

Step-by-step explanation:

n(A)+n(B)=n(A∩B)+n(A∪B)⟹n(A∩B)+n(A∪B)=100⟹.n(A∪B)=100−n(A∩B)(−1)×0≤(−1)×n(A∩B)≤(−1)400≥−n(A∩B)≥−400+100≥100−n(A∩B)≥−40+100100≥n(A∪B)≥60.

Answer 2

Answer:

n(a u b)=n(a)+n(b)-n(a n b)

100=60+n(b)-45

n(b)=85

Step-by-step explanation:

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