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40% of the children in a school have a dog, 35% have a cat, and 15%...

40% of the children in a school have a dog, 35% have a cat, and 15% have a dog and a cat. A child is selected at random. What is the probability that he has a dog but not a cat?

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Answer #1

Let, Do Event of Event of Having Dog Event of Having с. cal- Dne - Event of Having a dog and a and a cal- Given. P(D): 40% =0

Probability that he has a dog but not cat is 0.25

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