Answer :
Answer:
She pulls 5 blue marbles
Step-by-step explanation:
Let x be the number of blue marbles
We are given that In her experiment, she finds that she is twice as likely to pull a red marble as a blue marble.
So, Number of red marbles = 2x
We are given that Marcia pulls 10 red marbles
So, [tex]2x = 10[/tex]
[tex]x =\frac{10}{2}[/tex]
x=5
Hence She pulls 5 blue marbles