Answer:
Let's see what to do buddy...
Step-by-step explanation:
_________________________________
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.
_________________________________
STEP (2)
Mario randomly selects a pet :
[tex] \frac{10}{27} \\ [/tex]
Is the Probability of selecting a cat.
##############################
[tex] \frac{9}{27} \\ [/tex]
Is the Probability of selecting a dog.
_________________________________
STEP (3)
(( or )) in mathematics means plus (( + )) .
So the Probability of selecting a cat or a dog means :
[tex] \frac{10}{27} + \frac{9}{27} = \frac{19}{27} \\ [/tex]
_________________________________
STEP (4)
There's no STEP 4.
And we're done.
Thanks for watching buddy good luck.
♥️♥️♥️♥️♥️