Question

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At my office, 16 people own cats, 9 people own dogs, and 3 people own both cats and dogs. How many people own a cat or a dog?

Answer 1

Answer:

22 people

Step-by-step explanation:

Using the concept of a Venn Diagram, you place the 3 people in the intersection. Then, you subtract the three from both groups to keep the balance.

Since you said "or", you just add the entirety of the population.

$(16 - 3) + (9 - 3) + 3 = 22$

Answer 2

Answer:

22

Step-by-step explanation:

n(DUC) = n(C) + n(D) - n(C^D)

n(DUC) = 9 + 16 - 3 = 22