How many people will be in my group for Trailblazers and what's the instructor to child ratio?

Children are split into 2 groups: Juniors (aged 7–12) and Seniors (aged 11–15). A minimum of three children is required to run the course. There is a maximum of 8 children in the Junior group and 10 in the Senior group. In the rare event a course minimum is not met, transfers to another course or a full refund will be offered. The instructor to child ratio is 1:10.