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Chapter 13: Q 13. (page 847)

IfnA鈭�B=10,nB=20,nA鈭�B=50, findnA.

Short Answer

Expert verified

nA=40.

Step by step solution

01

Step 1. Given Information.

The given values arenA鈭�B=10,nB=20,nA鈭�B=50.

02

Step 2. Calculation of nA.

Using the Counting principle, we get

nA鈭�B=nA+nB-nA鈭�B50=nA+20-1050=nA+10nA=40.

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