Question

If n(U)=500, n(F)=285, n(H)=195, n(B)=115, n(F∩B)=45, n(F∩H)=70, n(H∩B)=50, n(H∪B∪F)’=50, then find n(H∩B∩F) and n(H-B-F) + n(B-F-H) + n(F-B-H).

Answer:

Values of n(H∩B∩F) and n(H-B-F) + n(B-F-H) + n(F-B-H) are 20 and 325 respectively.

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