Answer :
We have a total of 58 songs in all the discs.
The probability of getting a song from disc 4 first is:
[tex]P=\frac{12}{58}=\frac{6}{29}[/tex]Now, the probability of getting a song fomr disc 1 second is:
[tex]P=\frac{16}{57}[/tex]Therefore the probability of this things happen after one another is:
[tex]P=\frac{6}{29}\cdot\frac{16}{57}=\frac{32}{551}=0.058[/tex]