2020 lat TUDN
Simone plans to conduct a survey at her family reunion to determine the family members'
favorite kind of pie.
Which sampling method would most likely provide a representative sample of the members at
Simone's family reunion?
A. Survey every 5th family member who arrives at the reunion.
B. Survey every 3rd man over 50 years old who arrives at the reunion.
C. Survey every 4th girl under 8 years of age who arrives at the reunion.
D. Survey every other woman over 65 years old who arrives at the reunion.

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 ?