Probabilities using hypergeometric distribution.
There are 20 families living in Will Development. Of these families 10 prepared their own federal income tax for last year, 7 had they prepared by a local professional, 3 by H&R Block.
a. What is likelihood of selecting a family that prepared own taxes?
b. What is possibility of selecting two families which both prepared own taxes?
c. What is probability of selecting 3 families all prepared own taxes?
d. What is probability of selecting 2 families neither had taxes prepared by H&R Block?