Translate at least, more than and between

Press these keys

Walkthrough

1. 1
   Write notation first

   At least k: P(X≥k); more than k: P(X>k); fewer than k: P(X<k).

2. 2
   Use complement

   P(X≥k)=1−P(X≤k−1); P(X>k)=1−P(X≤k); P(X<k)=P(X≤k−1).

3. 3
   Between

   For a≤X≤b use binomcdf(n,p,b)−binomcdf(n,p,a−1).

Worked example