Write the set containing two females in terms of A and B.   e. List the elements in !A, AB, AuB (union), and !(AB).

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Five applicants (Jim, Don, Mary, Sue, and Nancy) are available for two identical jobs. A supervisor selects two applicants to fill these jobs.

 

a. List all possible ways in which the jobs can be filled. (That is, list all possible selections of two applicants from the five.)

ans: S = {JD, JM, JS, JN, DM, DS, DN , MS, MN, SN}

b. Let A denote the set of selections containing at least one male. How many elements are in A?

ans : A = {JM, JS, JN, DM, DS, DN, JD}

Set A contains 7 elements

c. Let B denote the set of selections containing exactly one male, How many elements are in B?

ans : A = {JM, JS, JN, DM, DS, DN}

Set A contains 6 elements

d. Write the set containing two females in terms of A and B.

 

e. List the elements in !A, AB, AuB (union), and !(AB).

 

Note: I need help with parts d and e.

Expert Solution
Step 1

According to the given information,

S=JD, JM, JS, JN, DM, DS, DN , MS, MN, SN

A=JM, JS, JN, DM, DS, DN, JD

B=JM, JS, JN, DM, DS, DN

 

Where the set 'S' represents all the possible ways of selecting two applicants out of two male and three female applicants, the set 'A' represents the possible ways of selecting two applicants such that at least one of them is a male applicant, and the set 'B' represents the possible ways of selecting two applicants such that exactly one of the two selected applicant is male.

  • Union of two set: AB is the union of two sets A and B, which contains all elements of set  A and set B, without any repetition of any element. 
  • Intersection of two sets: AB is intersection of two set A and B, which contains all the elements present in both sets A and B.
  • Complement of set: !A is complement of set A, containing all those elements of universal set which are not present in A.
  • Universal Set: Universal set is a set which has all the elements of all related sets, without the repetition of any element.
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