Mary was asked to describe this distribution about states West of the Mississippi. Below is what she has written so far. Distribution "Although the range of pupil-to-teacher ratios for the West is 10 units and can go as high as 22, it seems that a typical ratio is between 15 and 16. There do not seem to be any states with unusually high or low pupil-to-teacher ratios..." Mary is missing only ONE thing from her description. Complete her description below.

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?