Answer:
Let's see what to do buddy...
Step-by-step explanation:
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STEP (1)
We have to know how many pets does the pet store have.
Look : 10 + 9 + 8 = 27
So the pet store completely have 27 pets.
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STEP (2)
Mario randomly selects a pet :
![\frac{10}{27} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B10%7D%7B27%7D%20%5C%5C%20%20)
Is the Probability of selecting a cat.
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![\frac{9}{27} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B9%7D%7B27%7D%20%5C%5C%20%20)
Is the Probability of selecting a dog.
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STEP (3)
(( or )) in mathematics means plus (( + )) .
So the Probability of selecting a cat or a dog means :
![\frac{10}{27} + \frac{9}{27} = \frac{19}{27} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B10%7D%7B27%7D%20%2B%20%20%5Cfrac%7B9%7D%7B27%7D%20%3D%20%20%5Cfrac%7B19%7D%7B27%7D%20%5C%5C%20%20%20%20)
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STEP (4)
There's no STEP 4.
And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️