DScout- What do you Consider "A lot of Scouts"?

I always hear everyone say that the one of the reasons that they are successful at being accepted for missions is because they only apply to ones that are accepting a lot of applicants. What do you Consider to be a lot?? 15? Because it Seems like majority of the missions are only looking for like 4-6 people so I was just curious what different people consider "A lot" to be.......