Answer:

The music teacher can select a trio for 60 ways.

Step-by-step explanation:

In this case, we’ll use the formula:

n (n - 1) (n - 2) where n is 5

kasi the music teacher can’t pick the same girl twice, leaving the remaining ones para pagpilian pa .

Substituting and simplifying the equation will lead us to:

= 5 ( 5 - 1 ) ( 5 - 2 )

= 5 (4) (3)

= 60  

Therefore, the music teacher can select a trio for 60 ways.