The blood-typing system is based on the presence or absence of antigens.  A person with antigen A has blood type A.  A person with antigen B has blood type B, and a person with both antigens has the blood type AB.  If there are no antigens, then the blood type is O.  In addition, blood types are also identified as Rh-positive or Rh-negative based on a different antigen. What is the probability that a person has the antigens A or B?

A company requires all job applicants to undergo drug testing for employment. If the applicant has used drugs the test has a 90% chance of a positive result. If the applicant has not used drugs the test has an 85% chance of a negative result. 4% of all applicants have used drugs. If an applicant has a positive test, what is the probability he or she has actually used drugs?

With regards to a particular gene, the percentage of genotypes AA, Aa, and aa in a particular population are respectively, 60%, 30%, and 10%. Furthermore, the percentages of these genotypes that contract a certain disease are respectively. 1%, 5% and 20%. If a person does contract the disease, what is the probability that the person is of genotype AA?

A certain typing agency employs two typists. The average number of errors per article is 1.4 when typed by the first typist and 2.4 when typed by the second. If your article is equally likely to be typed by either typist, find the probability that it will have no errors.

A drawer contains a large number of batteries - 70% areEnergizer batteries and 30% are Duracell batteries.Suppose that 20% of the Energizer batteries are deadand 40% of the Duracell batteries are dead. If yourandomly select a battery from the door and it is dead,what is the probability it is a Duracell battery

Each of two parents has the genotype blue/brown​, which consists of the pair of alleles that determine eye color​, and each parent contributes one of those alleles to a child. Assume that if the child has at least one blue ​allele, that color will dominate and the​ child's eye color will be blue. a. List the different possible outcomes. Assume that these outcomes are equally likely. b. What is the probability that a child of these parents will have the brown/brown ​genotype? c. What is the probability that the child will have blue eye color​?