Aron has a bag of marbles that contains three red (r) marbles, four green (g) marbles, and three blue (b) marbles. which expression represents the probability of randomly selecting a green (g) marble, replacing it, and then randomly selecting a red (r) marble?

We know that

red marbies=3> r=3
green marbies=4> g=4
blue marbies=3> b=3
total marbles in the bag=r+g+b> 3+4+3> 10

a) probability of randomly selecting a green (g) marble
P(green)=g/total marbles> 4/10> 2/5

b) probability of randomly selecting a red (r) marble
the marble is replaced so we have the same total marbles
P(red)=r/total marbles> 3/10

c) Total probability of selecting this path is:
P(green)*P(red)> (2/5)*(3/10)> 6/50> 3/25> 0.12  (12%)

the answer is
0.12  (12%)