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there are 30 children in a class and they all have at least one cat or dog. 14 children have a cat, 19 children have a dog. what is the probability that a child chosen at random from the class has both a cat and a dog?

Sagot :

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The probability that a child chosen at random from the class has both a cat and a dog is 1/10.

Suppose b is the total number of kids that have both:

• children having a cat Only must be 14 - b

• children having a dog Only must be 19 - b

We also get:

We also know there are 30 kids, therefore

⇒ (14 - b) + b + (19 - b) = 30

⇒ 33 - b = 30

⇒ b = 3

Consequently, we now understand:

3/30 = 1/10

Know more about probability at:

https://brainly.com/question/24756209

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