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nA=35 andnB=42 ,n A intersecrion B=1 …

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nA=35 andnB=42 ,n A intersecrion B=1 so find that A-B=?
  • 2 answers

Mayank Bhunia 7 years, 4 months ago

n(A-B)=34 . I can be wrong but i did it this way that nA-B equals to no. Of elements in A which are not present in B . But nA^B=1 says that there is one common element in A and B.so we remove that element. And get 34 elements

Lakshya Singh 7 years, 4 months ago

n(A-B)=76
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