Answer: [tex]\frac{5}{6}[/tex]
Step-by-step explanation:
When finding the probability you normally do a certain number out of the total number.
For this question, you have a total of 12 marbles; 2 pink, 6 red, and 4 blue.
The problem is asking you to find the probability that the marble you picked out was either red or blue.
To figure this out, you first add all the marbles together.
2 + 6 + 4 = 12 marbles
Then, you add the red and blue marbles.
6 + 4 = 10
Now you just make it a fraction, which would be [tex]\frac{10}{12}[/tex].
Since that fraction isn't on there, you have to simplify it, which would give you [tex]\frac{5}{6}[/tex].
