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Chapter 13: Q 17. (page 847)

Use the information given in the figure.

How many are in A or B?

Short Answer

Expert verified

nA∪B=37.

Step by step solution

01

Step 1. Given Information.

The given figure is

02

Step 2. Calculation of a value.

nA=25,nB=20,nA∩B=8

Then, using values in the principle.

Using Counting principle, we get

nA∪B=nA+nB-nA∩BnA∪B=25+20-8nA∪B=37

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