Consider a completely randomized design with k treatments. Assume all pairwise comparisons of treatment means are to

Question:

Consider a completely randomized design with k treatments. Assume all pairwise comparisons of treatment means are to be made using a multiple comparisons procedure. Determine the total number of pairwise comparisons for the following values of k.
a. k = 3
b. k = 5
c k = 4
d. k = 10