THe probability is 0.047.
Given:
Number of red marbles is, <em>n</em>(<em>R</em>) = 9.
Number of blue marbles is, <em>n</em>(<em>B</em>) = 3.
Number of green marbles is, <em>n</em>(<em>G</em>) = 4.
The objective is to daw a blue marble and then a green marble with replacement.
The total number of marbles is,
Now, the probability of drawing a blue marble and then a green marble with replacement will be,
Hence, the required probability is 0.047.