Final answer:
To find the total number of musicians, set up a proportion using the given ratio and the number of drummers. Solve the proportion to find the number of guitar players. Add the number of guitar players and drummers to find the total number of musicians.
Step-by-step explanation:
To find the total number of musicians, we need to know the ratio between guitar players and drummers who tried out for the band. The given ratio is 5:10, which means for every 5 guitar players, there are 10 drummers. Since we know there are 20 drummers, we can set up a proportion to find the number of guitar players: 5/10 = x/20. Solving this proportion, we find that x = 10. So, there are 10 guitar players and 20 drummers, making a total of 30 musicians altogether.