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Chapter 13: Q 11. (page 847)

IfnA=15,nB=20,nA鈭�B=10. findnA鈭�B.

Short Answer

Expert verified

nA鈭�B=25.

Step by step solution

01

Step 1. Given Information.

The given values are

nA=15,nB=20,nA鈭�B=10.

02

Step 2. Value of nA∪B.

Using the Counting principle, we get

nA鈭�B=nA+nB-nA鈭�B

nA鈭�B=15+20-10nA鈭�B=25.

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