Question

If n(G)=20,n(H)=32 and G n H={ },then n(G U H)=?​

Answer 1

Answer:

We know that,

n(A)+n(B)-n(A intersection B)=n(A union B)

Here,

n(A)=n(G)=20

n(B)=n(H)=32

n(A intersection B)=n(G intersection H)={ }=0

By substituting the above values in the formula,

=》 20+32-0=n(G union H)

=》 52-0=n(G union H)

=》 52=n(G union H)

=》n(G union H)=52

The correct answer is 52.

I hope it is helpful.

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