Sara has a box that holds 7 blue marbles, 5 purple marbles, 3 white marbles, and 15 red marbles. She pulls one marble out of the box without looking. What is the probability of pulling a red marble

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Answer:

[tex]\frac{15}{30}[/tex] or [tex]\frac{1}{2}[/tex] is your answer

Step-by-step explanation:

First, add everything up,

7 + 5 + 3 + 15 = 30

This is what we have to so far

[tex]\frac{x}{30}[/tex]

Then, we put the number of red marbles in place of x.

[tex]\frac{15}{30}[/tex]

If you need the simplified version it is [tex]\frac{1}{2}[/tex]