a clinical cohort consists of seven sets of boy/girl twins (i.e. each twin pair has a brother and a sister). Five of the fourteen subjects are randomly selected
Awhat is the probability that the selected group is niether all male nor all female?
Bwhat is the probability that the selected group contains no siblings?
Awhat is the probability that the selected group is niether all male nor all female?
Bwhat is the probability that the selected group contains no siblings?