Question

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?

Answer 1

4/10(3/10)

Explanation:

there are 4 green marbles out of a total of 10 so 4/10

there are 3 red marbles out of a total of 10 so 3/10

Answer 2

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%)