1.

Fn * (A) = 60 and n(A cap B)=20 then find n o (A) step by step​

Answer»

Answer:

30

Step-by-step explanation:

here use formula

N(AUB)=n(A-B)+n(ANB)+n(B-A)

60=20+10+n(B-A)

n(B-A)=30



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