A national survey indicated that 30% of adults conduct their banking online. It also found that 40% are under the age of 50, and that 25% are under the age of 50 and conduct their banking online.
a) What percentage of adults do not conduct their banking online?
b) What type of probability is the 25% mentioned above?
c) Construct a contingency table showing all joint and marginal probabilities.
d) What is the probability that an individual conducts banking online given that the individual is under the age of 50?
e) Are Banking online and Age independent? Explain.