Given data:
The total numbers of balloons are n=60.
The numbers of red balloons are r=25.
The numbers of blue balloons are b=15.
The numbers of yellow balloons are y=20.
The expression for the probability that a randomly selected balloon will be red.
[tex]\begin{gathered} P(r)=\frac{r}{n} \\ =\frac{25}{60} \\ =\frac{5}{12} \end{gathered}[/tex]Thus, there is 5/12 probability that a randomly selected balloon will be red.