Answer:
Ski club have total 50 members.
Explanation:
The Mogul Runners Ski club planned a trip to Park City.
13 members out of the total members are signed up to go.
This is 26% of the club.
Let the number of total member of the club be 'x'
26% of x = 13
of x = 13
0.26x = 13
x =

x = 50 members.
Ski club have total 50 members.