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How many are in A or B?

Use the information given in the figure.

How many are in A or B?

asked Feb 16, 2015 in PRECALCULUS by anonymous
reshown Feb 16, 2015 by goushi

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1 Answer

Step 1:

From the figure,

The number of elements in set is .

The number of elements in set is and .

Counting formula: If and are two finite sets, then .

Substitute , and in above formula.

Number of elments in or is represented as .

Solution:

Number of elments in or is .

answered Feb 18, 2015 by cameron Mentor

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