Answer:
The total members in the Spanish Club = 50
Step-by-step explanation:
Let the total members in the Spanish Club = x
Now, number of girls in the club = 30
Three-fifths of the members are girls.
⇒
of total members x = 30
or, 
Now, solving for x, we get:

or, x = 50
Hence,the total members in the Spanish Club = 50